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Chehab M, Kouri BE, Miller MJ, Venkatesan AM. Image Fusion Technology in Interventional Radiology. Tech Vasc Interv Radiol 2023; 26:100915. [PMID: 38071026 DOI: 10.1016/j.tvir.2023.100915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Image fusion technology aims to improve patient outcomes for image-guided interventions by leveraging the strengths of multimodality imaging datasets. This most commonly involves the overlay or co-display of advanced cross-sectional imaging permitting freedom of device placement via conventional image guidance such as ultrasound, fluoroscopy, and computed tomography. This can allow the interventionalist to target and treat lesions that would otherwise be difficult or impossible to visualize and access using conventional imaging guidance. Furthermore, the use of image fusion can allow for procedures traditionally performed with cross-sectional imaging to be performed under ultrasound or fluoroscopy, by importing the data from preacquired cross-sectional imaging into the interventional procedure. This manuscript provides an overview of image fusion technologies used for interventional radiology (IR) guidance, with an emphasis on technical considerations.
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Affiliation(s)
- Monzer Chehab
- Radiology Department, Interventional Radiology, Beaumont Hospital, Dearborn, MI
| | - Brian E Kouri
- Atrium Health Wake Forest Baptist Hospital, Wake Forest University School of Medicine, Winston-Salem, NC
| | - Michael J Miller
- Atrium Health Wake Forest Baptist Hospital, Wake Forest University School of Medicine, Winston-Salem, NC
| | - Aradhana M Venkatesan
- Department of Abdominal Imaging, Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX.
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Winkelmann MT, Kübler J, Hoffmann R. Magnetic Resonance-guided Procedures: Consensus on Rationale, Techniques, and Outcomes. Tech Vasc Interv Radiol 2023; 26:100914. [PMID: 38071023 DOI: 10.1016/j.tvir.2023.100914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Magnetic resonance (MR) image guidance has demonstrated significant potential in the field of interventional radiology in several applications. This article covers the main points of MR-guided hepatic tumor ablation as a representative of MR-guided procedures. Patient selection and appropriate equipment utilization are essential for successful MR-guided tumor ablation. Intra-procedural planning imaging enables the visualization of the tumor and surrounding anatomical structures in most cases without the application of a contrast agent, ensuring optimal planning of the applicator tract. MRI enables real-time, multiplanar imaging, thus simultaneous observation of the applicator and target tumor is possible during targeting with adaptable slice angulations in case of challenging tumor positions. Typical ablation zone appearance during therapy monitoring with MRI enables safe assessment of the therapy result, resulting in a high primary efficacy rate. Recent advancements in ablation probes have shortened treatment times, while technical strategies address applicator visibility issues. MR-imaging immediately after the procedure is used to rule out complications and to assess technical success. Especially in smaller neoplasms, MRI-guided liver ablation demonstrates positive outcomes in terms of technical success rates, as well as promising survival and recurrence rates. Additionally, percutaneous biopsy under MR guidance offers an alternative to classic guidance modalities, providing high soft tissue contrast and thereby increasing the reliability of lesion detection, particularly in cases involving smaller lesions. Despite these advantages, the use of MR guidance in clinical routine is still limited to few indications and centers, due to by high costs, extended duration, and the need for specialized expertise. In conclusion, MRI-guided interventions could benefit from ongoing advancements in hardware, software, and devices. Such progress has the potential to expand diagnostic and treatment options in the field of interventional radiology.
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Affiliation(s)
- Moritz T Winkelmann
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Tuebingen, Germany.
| | - Jens Kübler
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Tuebingen, Germany
| | - Rüdiger Hoffmann
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Tuebingen, Germany
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Özen AC, Russe MF, Lottner T, Reiss S, Littin S, Zaitsev M, Bock M. RF-induced heating of interventional devices at 23.66 MHz. MAGMA (NEW YORK, N.Y.) 2023:10.1007/s10334-023-01099-7. [PMID: 37195365 PMCID: PMC10386938 DOI: 10.1007/s10334-023-01099-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/29/2023] [Accepted: 05/04/2023] [Indexed: 05/18/2023]
Abstract
OBJECTIVE Low-field MRI systems are expected to cause less RF heating in conventional interventional devices due to lower Larmor frequency. We systematically evaluate RF-induced heating of commonly used intravascular devices at the Larmor frequency of a 0.55 T system (23.66 MHz) with a focus on the effect of patient size, target organ, and device position on maximum temperature rise. MATERIALS AND METHODS To assess RF-induced heating, high-resolution measurements of the electric field, temperature, and transfer function were combined. Realistic device trajectories were derived from vascular models to evaluate the variation of the temperature increase as a function of the device trajectory. At a low-field RF test bench, the effects of patient size and positioning, target organ (liver and heart) and body coil type were measured for six commonly used interventional devices (two guidewires, two catheters, an applicator and a biopsy needle). RESULTS Electric field mapping shows that the hotspots are not necessarily localized at the device tip. Of all procedures, the liver catheterizations showed the lowest heating, and a modification of the transmit body coil could further reduce the temperature increase. For common commercial needles no significant heating was measured at the needle tip. Comparable local SAR values were found in the temperature measurements and the TF-based calculations. CONCLUSION At low fields, interventions with shorter insertion lengths such as hepatic catheterizations result in less RF-induced heating than coronary interventions. The maximum temperature increase depends on body coil design.
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Affiliation(s)
- Ali Caglar Özen
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
| | - Maximilian Frederik Russe
- Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Thomas Lottner
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Simon Reiss
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sebastian Littin
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Maxim Zaitsev
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Michael Bock
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Kim K, Diederich C, Narsinh K, Ozhinsky E. Motion-robust, multi-slice, real-time MR thermometry for MR-guided thermal therapy in abdominal organs. Int J Hyperthermia 2023; 40:2151649. [PMID: 36535967 PMCID: PMC10269483 DOI: 10.1080/02656736.2022.2151649] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 11/18/2022] [Indexed: 12/24/2022] Open
Abstract
PURPOSE To develop an effective and practical reconstruction pipeline to achieve motion-robust, multi-slice, real-time MR thermometry for monitoring thermal therapy in abdominal organs. METHODS The application includes a fast spiral magnetic resonance imaging (MRI) pulse sequence and a real-time reconstruction pipeline based on multi-baseline proton resonance frequency shift (PRFS) method with visualization of temperature imaging. The pipeline supports multi-slice acquisition with minimal reconstruction lag. Simulations with a virtual motion phantom were performed to investigate the influence of the number of baselines and respiratory rate on the accuracy of temperature measurement. Phantom experiments with ultrasound heating were performed using a custom-made motion phantom to evaluate the performance of the pipeline. Lastly, experiments in healthy volunteers (N = 2) without heating were performed to evaluate the accuracy and stability of MR thermometry in abdominal organs (liver and kidney). RESULTS The multi-baseline approach with greater than 25 baselines resulted in minimal temperature errors in the simulation. Phantom experiments demonstrated a 713 ms update time for 3-slice acquisitions. Temperature maps with 30 baselines showed clear temperature distributions caused by ultrasound heating in the respiratory phantom. Finally, the pipeline was evaluated with physiologic motions in healthy volunteers without heating, which demonstrated the accuracy (root mean square error [RMSE]) of 1.23 ± 0.18 °C (liver) and 1.21 ± 0.17 °C (kidney) and precision of 1.13 ± 0.11 °C (liver) and 1.16 ± 0.15 °C (kidney) using 32 baselines. CONCLUSIONS The proposed real-time acquisition and reconstruction pipeline allows motion-robust, multi-slice, real-time temperature monitoring within the abdomen during free breathing.
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Affiliation(s)
- Kisoo Kim
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, USA
| | - Chris Diederich
- Department of Radiation Oncology, University of California, San Francisco, USA
| | - Kazim Narsinh
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, USA
| | - Eugene Ozhinsky
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, USA
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van den Bijgaart RJE, Mekers VE, Schuurmans F, Raaijmakers TK, Wassink M, Veltien A, Dumont E, Heerschap A, Fütterer JJ, Adema GJ. Mechanical high-intensity focused ultrasound creates unique tumor debris enhancing dendritic cell-induced T cell activation. Front Immunol 2022; 13:1038347. [PMID: 36569907 PMCID: PMC9768443 DOI: 10.3389/fimmu.2022.1038347] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 11/22/2022] [Indexed: 12/13/2022] Open
Abstract
Introduction In situ tumor ablation releases a unique repertoire of antigens from a heterogeneous population of tumor cells. High-intensity focused ultrasound (HIFU) is a completely noninvasive ablation therapy that can be used to ablate tumors either by heating (thermal (T)-HIFU) or by mechanical disruption (mechanical (M)-HIFU). How different HIFU ablation techniques compare with respect to their antigen release profile, their activation of responder T cells, and their ability to synergize with immune stimuli remains to be elucidated. Methods and results Here, we compare the immunomodulatory effects of T-HIFU and M-HIFU ablation with or without the TLR9 agonist CpG in the ovalbumin-expressing lymphoma model EG7. M-HIFU ablation alone, but much less so T-HIFU, significantly increased dendritic cell (DC) activation in draining lymph nodes (LNs). Administration of CpG following T- or M-HIFU ablation increased DC activation in draining LNs to a similar extend. Interestingly, ex vivo co-cultures of draining LN suspensions from HIFU plus CpG treated mice with CD8+ OT-I T cells demonstrate that LN cells from M-HIFU treated mice most potently induced OT-I proliferation. To delineate the mechanism for the enhanced anti-tumor immune response induced by M-HIFU, we characterized the RNA, DNA and protein content of tumor debris generated by both HIFU methods. M-HIFU induced a uniquely altered RNA, DNA and protein profile, all showing clear signs of fragmentation, whereas T-HIFU did not. Moreover, western blot analysis showed decreased levels of the immunosuppressive cytokines IL-10 and TGF-β in M-HIFU generated tumor debris compared to untreated tumor tissue or T-HIFU. Conclusion Collectively, these results imply that M-HIFU induces a unique context of the ablated tumor material, enhancing DC-mediated T cell responses when combined with CpG.
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Affiliation(s)
- Renske J. E. van den Bijgaart
- Radiotherapy & OncoImmunology Laboratory, Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Vera E. Mekers
- Radiotherapy & OncoImmunology Laboratory, Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Fabian Schuurmans
- Radiotherapy & OncoImmunology Laboratory, Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Tonke K. Raaijmakers
- Radiotherapy & OncoImmunology Laboratory, Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Melissa Wassink
- Radiotherapy & OncoImmunology Laboratory, Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Andor Veltien
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, Netherlands
| | | | - Arend Heerschap
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, Netherlands
| | - Jurgen J. Fütterer
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, Netherlands,Department of Robotics and Mechatronics, University of Twente, Enschede, Netherlands
| | - Gosse J. Adema
- Radiotherapy & OncoImmunology Laboratory, Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands,*Correspondence: Gosse J. Adema,
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Chen J, Yan Y, Lin Q, Chen J, Chen J, Lin Z. The correlation between multimodal radiomics and pathology about thermal ablation lesion of rabbit lung VX2 tumor. Front Oncol 2022; 12:941752. [PMID: 35965559 PMCID: PMC9366720 DOI: 10.3389/fonc.2022.941752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 06/27/2022] [Indexed: 11/17/2022] Open
Abstract
Objective To explore the correlation of CT-MRI pathology with lung tumor ablation lesions by comparing CT, MRI, and pathological performance of rabbit lung VX2 tumor after thermal ablation. Methods Thermal ablation including microwave ablation (MWA) and radiofrequency ablation (RFA) was carried out in 12 experimental rabbits with lung VX2 tumors under CT guidance. CT and MRI performance was observed immediately after ablation, and then the rabbits were killed and pathologically examined. The maximum diameter of tumors on CT before ablation, the central hypointense area on T2-weighted image (T2WI) after ablation, and the central hyperintense area on T1-weighted image (T1WI) after ablation and pathological necrosis were measured. Simultaneously, the maximum diameter of ground-glass opacity (GGO) around the lesion on CT after ablation, the surrounding hyperintense area on T2WI after ablation, the surrounding isointense area on T1WI after ablation, and the pathological ablation area were measured, and then the results were compared and analyzed. Results Ablation zones showed GGO surrounding the original lesion on CT, with a central hypointense and peripheral hyperintense zone on T2WI as well as a central hyperintense and peripheral isointense zone on T1WI. There was statistical significance in the comparison of the maximum diameter of the tumor before ablation with a central hyperintense zone on T1WI after ablation and pathological necrosis. There was also statistical significance in the comparison of the maximum diameter of GGO around the lesion on CT with the surrounding hyperintense zone on T2WI and isointense on T1WI after ablation and pathological ablation zone. There was only one residual tumor abutting the vessel in the RFA group. Conclusions MRI manifestations of thermal ablation of VX2 tumors in rabbit lungs have certain characteristics with a strong pathological association. CT combined with MRI multimodal radiomics is expected to provide an effective new method for clinical evaluation of the immediate efficacy of thermal ablation of lung tumors.
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Affiliation(s)
- Jin Chen
- The Department of Interventional Radiology, First Affiliated Hospital of Fujian Medical University, Fujian Provincial Key Laboratory of Precision Medicine for Cancer, Fuzhou, China
| | - Yuan Yan
- The Department of Interventional Radiology, First Affiliated Hospital of Fujian Medical University, Fujian Provincial Key Laboratory of Precision Medicine for Cancer, Fuzhou, China
| | - QingFeng Lin
- The Department of Interventional Radiology, First Affiliated Hospital of Fujian Medical University, Fujian Provincial Key Laboratory of Precision Medicine for Cancer, Fuzhou, China
| | - Jian Chen
- The Department of Interventional Radiology, First Affiliated Hospital of Fujian Medical University, Fujian Provincial Key Laboratory of Precision Medicine for Cancer, Fuzhou, China
| | - Jie Chen
- The Department of Interventional Radiology, Sanming Second Hospital, Sanming, China
| | - ZhengYu Lin
- The Department of Interventional Radiology, First Affiliated Hospital of Fujian Medical University, Fujian Provincial Key Laboratory of Precision Medicine for Cancer, Fuzhou, China
- *Correspondence: ZhengYu Lin,
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Hensen B, Drenkmann U, Frericks B, Rothgang E, Gutberlet M, Länger F, Gilson W, Valdeig S, Weiss CR, Wacker F. Detection of Ablation Boundaries Using Different MR Sequences in a Swine Liver Model. Cardiovasc Intervent Radiol 2022; 45:1010-1018. [PMID: 35449314 PMCID: PMC9226104 DOI: 10.1007/s00270-022-03143-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 03/29/2022] [Indexed: 11/23/2022]
Abstract
PURPOSE To determine the magnetic resonance (MR) sequences best suited for the assessment of ablation zones after radiofrequency ablation (RFA). METHODS Three percutaneous MR-guided RFA of the liver were performed on three swine. Four pre-contrast and two hepatobiliary post-contrast sequences were obtained after ablation. Tissue samples were extracted and stained for nicotinamide adenine dinucleotide diaphorase hydride (NADH) and with hematoxylin and eosin. Post-ablation MR images and NADH slides were segmented to determine the total ablation zone, their Dice similarity coefficient (DSC), and the contrast-to-noise ratio (CNR) of the visible ablation boundary to normal liver tissue. RESULTS Two distinct layers were combined to determine the ablation zone: an inner layer of coagulation necrosis and an outer layer defined as the peripheral transition zone. Corresponding zones could be found in the MR images as well. Compared to histology, the total area of the MR ablation zone was significantly smaller on the pre-contrast T1 images (p < 0.01) and significantly larger with T2 turbo spin-echo (p = 0.025). No significant difference in size of the ablation zone depiction could be found between histology, post-contrast T1 volumetric interpolated breath-hold examination (VIBE), and post-contrast T1 3D Turboflash (TFL) as well as T2 SPACE images. All sequences but the pre-contrast T1 VIBE sequence showed a DSC above 80% and a high CNR. CONCLUSIONS Post-contrast T1 3DTFL performs best when assessing ablation zones after RFA. Since the sequence requires a long acquisition time, T1 VIBE post-contrast offers the best compromise between acquisition time and estimation accuracy.
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Affiliation(s)
- Bennet Hensen
- Diagnostic and Interventional Radiology, Hannover Medical School, Hanover, Germany.
- STIMULATE-Solution Centre for Image Guided Local Therapies, Magdeburg, Germany.
| | - Urte Drenkmann
- STIMULATE-Solution Centre for Image Guided Local Therapies, Magdeburg, Germany
| | - Bernd Frericks
- Diagnostic and Interventional Radiology, DRK Kliniken Westend, Berlin, Germany
| | - Eva Rothgang
- Industrial Engineering, Ostbayerische Technische Hochschule Amberg-Weiden, Weiden, Germany
| | - Marcel Gutberlet
- Diagnostic and Interventional Radiology, Hannover Medical School, Hanover, Germany
| | - Florian Länger
- Department of Pathology, Hannover Medical School, Hanover, Germany
| | - Wesley Gilson
- Center for Applied Medical Imaging, Siemens Corporate Research, Baltimore, MD, USA
| | - Steffi Valdeig
- Division of Vascular and Interventional Radiology, Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD, USA
| | - Clifford R Weiss
- Division of Vascular and Interventional Radiology, Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD, USA
- The Johns Hopkins Center for Bioengineering Innovation and Design (CBID), Johns Hopkins University, Baltimore, MD, USA
| | - Frank Wacker
- Diagnostic and Interventional Radiology, Hannover Medical School, Hanover, Germany
- STIMULATE-Solution Centre for Image Guided Local Therapies, Magdeburg, Germany
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Abrishami Kashani M, Campbell-Washburn AE, Murphy MC, Catalano OA, McDermott S, Fintelmann FJ. Magnetic Resonance Imaging for Guidance and Follow-up of Thoracic Needle Biopsies and Thermal Ablations. J Thorac Imaging 2022; 37:201-216. [PMID: 35426857 PMCID: PMC10441002 DOI: 10.1097/rti.0000000000000651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Magnetic resonance imaging (MRI) is used for the guidance and follow-up of percutaneous minimally invasive interventions in many body parts. In the thorax, computed tomography (CT) is currently the most used imaging modality for the guidance and follow-up of needle biopsies and thermal ablations. Compared with CT, MRI provides excellent soft tissue contrast, lacks ionizing radiation, and allows functional imaging. The role of MRI is limited in the thorax due to the low hydrogen proton density and many air-tissue interfaces of the lung, as well as respiratory and cardiac motion. Here, we review the current experience of MR-guided thoracic needle biopsies and of MR-guided thermal ablations targeting lesions in the lung, mediastinum, and the chest wall. We provide an overview of MR-compatible biopsy needles and ablation devices. We detail relevant MRI sequences and their relative advantages and disadvantages for procedural guidance, assessment of complications, and long-term follow-up. We compare the advantages and disadvantages of CT and MR for thoracic interventions and identify areas in need of improvement and additional research.
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Affiliation(s)
| | - Adrienne E Campbell-Washburn
- Division of Intramural Research, Cardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
| | - Mark C Murphy
- Division of Thoracic Imaging and Intervention, Department of Radiology
| | - Onofrio A Catalano
- Division of Abdominal Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA
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Huang X, Zhou Y, Wang C, Qi F, Luo P, Du H, Zhang Q, Liu Z, Yuan K, Qiu B. Development of a novel MR-conditional microwave needle for MR-guided interventional microwave ablation at 1.5T. Magn Reson Med 2022; 88:1886-1900. [PMID: 35775830 DOI: 10.1002/mrm.29289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 04/11/2022] [Accepted: 04/14/2022] [Indexed: 11/08/2022]
Abstract
PURPOSE To develop an MR-conditional microwave needle that generates a spherical ablation zone and clear MRI visibility for MR-guided microwave ablation. METHODS An MR-conditional microwave needle consisting of zirconia tip and TA18 titanium alloy tube was investigated. The numerical model was created to optimize the needle's geometry and analyze its performance. A geometrically optimized needle was produced using non-magnetic materials based on the electromagnetics simulation results. The needle's mechanical properties were tested per the Chinese pharmaceutical industry standard YY0899-2013. The MRI visibility performance and ablation characteristics of the needle was tested both in vitro (phantom) and in vivo (rabbit) at 1.5T. The RF-induced heating was evaluated in ex vivo porcine liver. RESULTS The needle's mechanical properties met the specified requirements. The needle susceptibility artifact was clearly visible both in vitro and in vivo. The needle artifact diameter (A) was small in in vivo (Ashaft: 4.96 ± 0.18 mm for T1W-FLASH, 3.13 ± 0.05 mm for T2-weighted fast spin-echo (T2W-FSE); Atip: 2.31 ± 0.09 mm for T1W-FLASH, 2.29 ± 0.08 mm for T2W-FSE; tip location error [TLE]: -0.94 ± 0.07 mm for T1W-FLASH, -1.10 ± 0.09 mm for T2W-FSE). Ablation zones generated by the needle were nearly spherical with an elliptical aspect ratio ranging from 0.79 to 0.90 at 30 W, 50 W for 3, 5, 10 min duration ex vivo ablations and 0.86 at 30 W for 10 min duration in vivo ablations. CONCLUSION The designed MR-conditional microwave needle offers excellent mechanical properties, reliable MRI visibility, insignificant RF-induced heating, and a sufficiently spherical ablation zone. Further clinical development of MR-guided microwave ablation appears warranted.
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Affiliation(s)
- Xiaoyan Huang
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
| | - Yufu Zhou
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
| | - Changliang Wang
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
| | - Fulang Qi
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
| | - Penghui Luo
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
| | - Huiyu Du
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
| | - Qing Zhang
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
| | - Zhengrong Liu
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
| | - Kecheng Yuan
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
| | - Bensheng Qiu
- Hefei National Lab for Physical Science at the Microscale and the Centers for Biomedical Engineering, University of Science and Technology of China, Hefei, AnHui Province, China
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Sametova A, Kurmashev S, Ashikbayeva Z, Amantayeva A, Blanc W, Atabaev TS, Tosi D. Fiber-Optic Distributed Sensing Network for Thermal Mapping of Gold Nanoparticles-Mediated Radiofrequency Ablation. BIOSENSORS 2022; 12:bios12050352. [PMID: 35624653 PMCID: PMC9138323 DOI: 10.3390/bios12050352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/17/2022] [Accepted: 05/17/2022] [Indexed: 11/21/2022]
Abstract
In this work, we report the design of an optical fiber distributed sensing network for the 2-dimensional (2D) in situ thermal mapping of advanced methods for radiofrequency thermal ablation. The sensing system is based on six high-scattering MgO-doped optical fibers, interleaved by a scattering-level spatial multiplexing approach that allows simultaneous detection of each fiber location, in a 40 × 20 mm grid (7.8 mm2 pixel size). Radiofrequency ablation (RFA) was performed on bovine phantom, using a pristine approach and methods mediated by agarose and gold nanoparticles in order to enhance the ablation properties. The 2D sensors allow the detection of spatiotemporal patterns, evaluating the heating properties and investigating the repeatability. We observe that agarose-based ablation yields the widest ablated area in the best-case scenario, while gold nanoparticles-mediated ablation provides the best trade-off between the ablated area (53.0–65.1 mm2, 61.5 mm2 mean value) and repeatability.
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Affiliation(s)
- Akbota Sametova
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (A.S.); (S.K.); (Z.A.); (A.A.)
| | - Sabit Kurmashev
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (A.S.); (S.K.); (Z.A.); (A.A.)
| | - Zhannat Ashikbayeva
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (A.S.); (S.K.); (Z.A.); (A.A.)
| | - Aida Amantayeva
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (A.S.); (S.K.); (Z.A.); (A.A.)
| | - Wilfried Blanc
- Université Côte d’Azur, INPHYNI, CNRS UMR7010, Avenue Joseph Vallot, 06108 Nice, France;
| | - Timur Sh. Atabaev
- Department of Chemistry, Nazarbayev University, 53 Kabanbay Batyr Avenue, Nur-Sultan 010000, Kazakhstan;
| | - Daniele Tosi
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (A.S.); (S.K.); (Z.A.); (A.A.)
- National Laboratory Astana, Laboratory of Biosensors and Bioinstruments, Nur-Sultan 010000, Kazakhstan
- Correspondence:
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Xu G, Zhao Z, Xu K, Zhu J, Roe AW, Xu B, Zhang X, Li J, Xu D. Magnetic resonance temperature imaging of laser-induced thermotherapy using proton resonance frequency shift: evaluation of different sequences in phantom and porcine brain at 7 T. Jpn J Radiol 2022; 40:768-780. [DOI: 10.1007/s11604-022-01263-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 03/02/2022] [Indexed: 10/18/2022]
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12
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Li X, Jia X, Shen T, Wang M, Yang G, Wang H, Sun Q, Wan M, Zhang S. Ultrasound Entropy Imaging for Detection and Monitoring of Thermal Lesion During Microwave Ablation of Liver. IEEE J Biomed Health Inform 2022; 26:4056-4066. [PMID: 35417359 DOI: 10.1109/jbhi.2022.3167252] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Ultrasonic B-mode imaging offers non-invasive and real-time monitoring of thermal ablation treatment in clinical use, however it faces challenges of moderate lesion-normal contrast and detection accuracy. Quantitative ultrasound imaging techniques have been proposed as promising tools to evaluate the microstructure of ablated tissue. In this study, we introduced Shannon entropy, a non-model based statistical measurement of disorder, to quantitatively detect and monitor microwave-induced ablation in porcine livers. Performance of typical Shannon entropy (TSE), weighted Shannon entropy (WSE), and horizontally normalized Shannon entropy (hNSE) were explored and compared with conventional B-mode imaging. TSE estimated from non-normalized probability distribution histograms was found to have insufficient discernibility of different disorder of data. WSE that improves from TSE by adding signal amplitudes as weights obtained area under receiver operating characteristic (AUROC) curve of 0.895, whereas it underestimated the periphery of lesion region. hNSE provided superior ablated area prediction with the correlation coefficient of 0.90 against ground truth, AUROC of 0.868, and remarkable lesion-normal contrast with contrast-to-noise ratio of 5.86 which was significantly higher than other imaging methods. Data distributions shown in horizontally normalized probability distribution histograms indicated that the disorder of backscattered envelope signal from ablated region increased as treatment went on. These findings suggest that hNSE imaging could be a promising technique to assist ultrasound guided percutaneous thermal ablation.
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Thompson SM, Gorny KR, Koepsel EMK, Welch BT, Mynderse L, Lu A, Favazza CP, Felmlee JP, Woodrum DA. Body Interventional MRI for Diagnostic and Interventional Radiologists: Current Practice and Future Prospects. Radiographics 2021; 41:1785-1801. [PMID: 34597216 DOI: 10.1148/rg.2021210040] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Clinical use of MRI for guidance during interventional procedures emerged shortly after the introduction of clinical diagnostic MRI in the late 1980s. However, early applications of interventional MRI (iMRI) were limited owing to the lack of dedicated iMRI magnets, pulse sequences, and equipment. During the 3 decades that followed, technologic advancements in iMRI magnets that balance bore access and field strength, combined with the development of rapid MRI pulse sequences, surface coils, and commercially available MR-conditional devices, led to the rapid expansion of clinical iMRI applications, particularly in the field of body iMRI. iMRI offers several advantages, including superior soft-tissue resolution, ease of multiplanar imaging, lack of ionizing radiation, and capability to re-image the same section. Disadvantages include longer examination times, lack of MR-conditional equipment, less operator familiarity, and increased cost. Nonetheless, MRI guidance is particularly advantageous when the disease is best visualized with MRI and/or when superior soft-tissue contrast is needed for treatment monitoring. Safety in the iMRI environment is paramount and requires close collaboration among interventional radiologists, MR physicists, and all other iMRI team members. The implementation of risk-limiting measures for personnel and equipment in MR zones III and IV is key. Various commercially available MR-conditional needles, wires, and biopsy and ablation devices are now available throughout the world, depending on the local regulatory status. As such, there has been tremendous growth in the clinical applications of body iMRI, including localization of difficult lesions, biopsy, sclerotherapy, and cryoablation and thermal ablation of malignant and nonmalignant soft-tissue neoplasms. Online supplemental material is available for this article. ©RSNA, 2021.
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Affiliation(s)
- Scott M Thompson
- From the Department of Radiology (S.M.T., K.R.G., E.M.K.K., B.T.W., A.L., C.P.F., J.P.F., D.A.W.), Division of Vascular and Interventional Radiology (S.M.T.), and Department of Urology (L.M.), Mayo Clinic, 200 1st St SW, Rochester, MN 55905
| | - Krzysztof R Gorny
- From the Department of Radiology (S.M.T., K.R.G., E.M.K.K., B.T.W., A.L., C.P.F., J.P.F., D.A.W.), Division of Vascular and Interventional Radiology (S.M.T.), and Department of Urology (L.M.), Mayo Clinic, 200 1st St SW, Rochester, MN 55905
| | - Erica M Knavel Koepsel
- From the Department of Radiology (S.M.T., K.R.G., E.M.K.K., B.T.W., A.L., C.P.F., J.P.F., D.A.W.), Division of Vascular and Interventional Radiology (S.M.T.), and Department of Urology (L.M.), Mayo Clinic, 200 1st St SW, Rochester, MN 55905
| | - Brian T Welch
- From the Department of Radiology (S.M.T., K.R.G., E.M.K.K., B.T.W., A.L., C.P.F., J.P.F., D.A.W.), Division of Vascular and Interventional Radiology (S.M.T.), and Department of Urology (L.M.), Mayo Clinic, 200 1st St SW, Rochester, MN 55905
| | - Lance Mynderse
- From the Department of Radiology (S.M.T., K.R.G., E.M.K.K., B.T.W., A.L., C.P.F., J.P.F., D.A.W.), Division of Vascular and Interventional Radiology (S.M.T.), and Department of Urology (L.M.), Mayo Clinic, 200 1st St SW, Rochester, MN 55905
| | - Aiming Lu
- From the Department of Radiology (S.M.T., K.R.G., E.M.K.K., B.T.W., A.L., C.P.F., J.P.F., D.A.W.), Division of Vascular and Interventional Radiology (S.M.T.), and Department of Urology (L.M.), Mayo Clinic, 200 1st St SW, Rochester, MN 55905
| | - Christopher P Favazza
- From the Department of Radiology (S.M.T., K.R.G., E.M.K.K., B.T.W., A.L., C.P.F., J.P.F., D.A.W.), Division of Vascular and Interventional Radiology (S.M.T.), and Department of Urology (L.M.), Mayo Clinic, 200 1st St SW, Rochester, MN 55905
| | - Joel P Felmlee
- From the Department of Radiology (S.M.T., K.R.G., E.M.K.K., B.T.W., A.L., C.P.F., J.P.F., D.A.W.), Division of Vascular and Interventional Radiology (S.M.T.), and Department of Urology (L.M.), Mayo Clinic, 200 1st St SW, Rochester, MN 55905
| | - David A Woodrum
- From the Department of Radiology (S.M.T., K.R.G., E.M.K.K., B.T.W., A.L., C.P.F., J.P.F., D.A.W.), Division of Vascular and Interventional Radiology (S.M.T.), and Department of Urology (L.M.), Mayo Clinic, 200 1st St SW, Rochester, MN 55905
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Gohla G, Archid R, Hoffmann R, Kübler J, Munzel M, Königsrainer A, Nadalin S, Nikolaou K, Winkelmann MT. MRI-guided percutaneous thermoablation as first-line treatment of recurrent hepatic malignancies following hepatic resection: single center long-term experience. Int J Hyperthermia 2021; 38:1401-1408. [PMID: 34542009 DOI: 10.1080/02656736.2021.1979257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
PURPOSE Hepatic recurrence of liver malignancies is a leading problem in patients after liver resection with curative intention. Thermoablation is a promising treatment approach for patients after hepatic resection, especially in liver-limited conditions. This study aimed to investigate safety, survival, and local tumor control rates of MRI-guided percutaneous thermoablation of recurrent hepatic malignancies following hepatic resection. MATERIAL AND METHODS Data from patients with primary or secondary hepatic malignancies treated between 2004 and 2018 with MRI-guided percutaneous thermoablation of hepatic recurrence after prior hepatic resection were retrospectively analyzed. Disease-free survival and overall survival rates were calculated using the Kaplan-Meier method. RESULTS A total of 57 patients with hepatic recurrence (mean tumor size = 18.9 ± 9.1 mm) of colorectal cancer liver metastases (n = 27), hepatocellular carcinoma (n = 17), intrahepatic recurrence of cholangiocellular carcinoma (n = 9), or other primary malignant tumor entities (n = 4) were treated once or several times with MR-guided percutaneous radiofrequency (n = 52) or microwave ablation (n = 5) (range: 1-4 times). Disease progression occurred due to local recurrence at the ablation site in nine patients (15.8%), non-local hepatic recurrence in 33 patients (57.9%), and distant malignancy in 18 patients (31.6%). The median overall survival for the total cohort was 40 months and 49 months for the colorectal cancer group, with a 5-year overall survival rate of 40.7 and 42.5%, respectively. The median disease-free survival was 10 months for both the total cohort and the colorectal cancer group with a 5-year disease-free survival rate of 15.1 and 14.8%, respectively. The mean follow-up time was 39.6 ± 35.7 months. CONCLUSION MR-guided thermoablation is an effective and safe approach in the treatment of hepatic recurrences in liver-limited conditions and can achieve long-term survival.
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Affiliation(s)
- G Gohla
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
| | - R Archid
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, Tübingen, Germany
| | - R Hoffmann
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
| | - J Kübler
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
| | - M Munzel
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
| | - A Königsrainer
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, Tübingen, Germany
| | - S Nadalin
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, Tübingen, Germany
| | - K Nikolaou
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
| | - M T Winkelmann
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tübingen, Germany
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Sengupta S, Yan X, Hoyt TL, Drake G, Gunderman A, Chen Y. Minimal artifact actively shimmed metallic needles in MRI. Magn Reson Med 2021; 87:541-550. [PMID: 34411348 DOI: 10.1002/mrm.28977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 07/02/2021] [Accepted: 07/29/2021] [Indexed: 11/12/2022]
Abstract
PURPOSE Signal voids caused by metallic needles pose visualization and monitoring challenges in many MRI applications. In this work, we explore a solution to this problem in the form of an active shim insert that fits inside a needle and corrects the field disturbance (ΔB0 ) caused by the needle outside of it. METHODS The ΔB0 induced by a 4 mm outside-diameter titanium needle at 3T is modeled and a two-coil orthogonal shim set is designed and fabricated to shim the ΔB0 . Signal recovery around the needle is assessed in multiple orientations in a water phantom with four different pulse sequences. Phase stability around the needle is assessed in an ex-vivo porcine tissue dynamic gradient echo experiment with and without shimming. Additionally, heating of the shim insert is assessed under 8 min of continuous operation with 1A current and concurrent imaging. RESULTS An average recovery of ~63% of lost signal around the needle across orientations is shown with active shimming with a maximum current of 1.172 A. Signal recovery and correction of the underlying ΔB0 is shown to be independent of imaging sequence. Needle-induced phase gradients outside the perceptible signal void are also minimized with active shimming. Temperature rise of up to 0.9° Celsius is noted over 8 min of continuous 1A active shimming operation. CONCLUSION A sequence independent method for minimization of metallic needle induced signal loss using an active shim insert is presented. The method has potential benefits in a range of qualitative and quantitative interventional MRI applications.
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Affiliation(s)
- Saikat Sengupta
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Xinqiang Yan
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Tamarya L Hoyt
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Gary Drake
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Anthony Gunderman
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, Arkansas, USA
| | - Yue Chen
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA
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Li Z, Jiao D, Wang C, Li J, Liu Z, Zhang W, Han X. Microwave Ablation of Small Hepatic Metastases Using MR Guidance and Monitoring: Clinical Safety and Efficacy. Cancer Manag Res 2021; 13:3357-3366. [PMID: 33889024 PMCID: PMC8057791 DOI: 10.2147/cmar.s301856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/27/2021] [Indexed: 11/23/2022] Open
Abstract
Background To evaluate the technical success and clinical safety of magnetic resonance (MR)-guided microwave ablation (MWA) of small hepatic metastases. Materials and Methods Institutional review board approval and informed patient consent were obtained. A retrospective analysis of the patient data revealed 50 patients with small hepatic metastases (34 men, 16 women) who underwent MWA under MR guidance and monitoring. After the procedure, the intervention-related complications were classified according to the Common Terminology Criteria for Adverse Events (CTCAE) and Society of Interventional Radiology (SIR) classification system. Furthermore, the overall survival (OS) and local tumor-free survival (LTP) of the patients were analyzed. Results The patients who underwent MR-guided MWA achieved technical success. The mean energy, ablation duration per tumor, and procedure duration were 55.3 ± 9.4 kJ, 11.7 ± 5.6 min and 89.5 ± 30.9 min, respectively. Most adverse events and complications were CTCAE grade 1 or 2 or SIR classification grade A or B. The 1-, 2-, and 3-year local tumor progression (LTP) rates were 65.9%, 31.5% and 18.5%, respectively, with a mean LTP of 19.216 months (95% CI: 16.208, 22.224); and the 1-, 2- and 3-year overall survival (OS) rates were 81.8%, 60.8% and 44.7%, respectively, with a mean OS of 26.378 months (95% CI: 23.485, 29.270). Multivariate Cox’s regression analysis further illustrated that tumor location (challenging locations vs ordinary locations) and the anesthesia (general anesthesia VS local anesthesia) were important factors affecting LTP and OS. Conclusion MR-guided MWA can successfully treat small hepatic metastases with potentially favorable safety and technical efficacy.
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Affiliation(s)
- Zhaonan Li
- Department of Interventional Radiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, People's Republic of China
| | - Dechao Jiao
- Department of Interventional Radiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, People's Republic of China
| | - Chaoyan Wang
- Department of Interventional Radiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, People's Republic of China
| | - Jing Li
- Department of Interventional Radiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, People's Republic of China
| | - Zaoqu Liu
- Department of Interventional Radiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, People's Republic of China
| | - Wenguang Zhang
- Department of Interventional Radiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, People's Republic of China
| | - Xinwei Han
- Department of Interventional Radiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, People's Republic of China
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Magnetic Resonance-Guided High-Intensity Focused Ultrasound Ablation of Uterine Fibroids-Efficiency Assessment with the Use of Dynamic Contrast-Enhanced Magnetic Resonance Imaging and the Potential Role of the Administration of Uterotonic Drugs. Diagnostics (Basel) 2021; 11:diagnostics11040715. [PMID: 33923667 PMCID: PMC8072686 DOI: 10.3390/diagnostics11040715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/11/2021] [Accepted: 04/13/2021] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE The assessment of the usefulness of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) when qualifying patients with uterine fibroids (UFs) for magnetic resonance-guided high-intensity ultrasound (MR-HIFU). MATERIAL AND METHODS This retrospective, single center study included 283 women who underwent DCE-MRI and were treated with MR-HIFU. The patients were divided according to non-perfused volume (NPV) as well as by the type of curve for patients with a washout curve in the DCE-MRI study and patients without a washout curve. The studied women were assessed in three groups according to the type of uterotonics administered. Group A (57 patients) received one dose of misoprostol/diclofenac transvaginally and group B (71 patients) received oxytocin intravenously prior to the MR-HIFU procedure. The remaining 155 women (group C) were treated with the traditional non-drug enhanced MR-HIFU procedure. RESULTS The average NPV value was higher in no washout group, and depended on the uterotonics used. CONCLUSIONS We demonstrated a correlation between dynamic contrast enhancement curve types and the therapeutic efficacy of MR-HIFU. Our results suggest that DCE-MRI has the potential to assess treatment outcomes among patients with UFs, and patients with UFs that present with a washout curve may benefit from the use of uterotonic drugs. More studies are required to draw final conclusions.
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Beisenova A, Issatayeva A, Ashikbayeva Z, Jelbuldina M, Aitkulov A, Inglezakis V, Blanc W, Saccomandi P, Molardi C, Tosi D. Distributed Sensing Network Enabled by High-Scattering MgO-Doped Optical Fibers for 3D Temperature Monitoring of Thermal Ablation in Liver Phantom. SENSORS (BASEL, SWITZERLAND) 2021; 21:828. [PMID: 33513666 PMCID: PMC7865229 DOI: 10.3390/s21030828] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/27/2020] [Accepted: 01/05/2021] [Indexed: 01/19/2023]
Abstract
Thermal ablation is achieved by delivering heat directly to tissue through a minimally invasive applicator. The therapy requires a temperature control between 50-100 °C since the mortality of the tumor is directly connected with the thermal dosimetry. Existing temperature monitoring techniques have limitations such as single-point monitoring, require costly equipment, and expose patients to X-ray radiation. Therefore, it is important to explore an alternative sensing solution, which can accurately monitor temperature over the whole ablated region. The work aims to propose a distributed fiber optic sensor as a potential candidate for this application due to the small size, high resolution, bio-compatibility, and temperature sensitivity of the optical fibers. The working principle is based on spatial multiplexing of optical fibers to achieve 3D temperature monitoring. The multiplexing is achieved by high-scattering, nanoparticle-doped fibers as sensing fibers, which are spatially separated by lower-scattering level of single-mode fibers. The setup, consisting of twelve sensing fibers, monitors tissue of 16 mm × 16 mm × 25 mm in size exposed to a gold nanoparticle-mediated microwave ablation. The results provide real-time 3D thermal maps of the whole ablated region with a high resolution. The setup allows for identification of the asymmetry in the temperature distribution over the tissue and adjustment of the applicator to follow the allowed temperature limits.
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Affiliation(s)
- Aidana Beisenova
- Department of Computer and Electrical Engineering, Nazarbayev University, Kabanbay batyr, Nur-Sultan 010000, Kazakhstan; (A.B.); (Z.A.); (M.J.); (A.A.); (C.M.); (D.T.)
| | - Aizhan Issatayeva
- Department of Computer and Electrical Engineering, Nazarbayev University, Kabanbay batyr, Nur-Sultan 010000, Kazakhstan; (A.B.); (Z.A.); (M.J.); (A.A.); (C.M.); (D.T.)
| | - Zhannat Ashikbayeva
- Department of Computer and Electrical Engineering, Nazarbayev University, Kabanbay batyr, Nur-Sultan 010000, Kazakhstan; (A.B.); (Z.A.); (M.J.); (A.A.); (C.M.); (D.T.)
- Laboratory of Biosensors and Bioinstruments, National Laboratory of Astana, Kabanbay batyr, Nur-Sultan 010000, Kazakhstan
| | - Madina Jelbuldina
- Department of Computer and Electrical Engineering, Nazarbayev University, Kabanbay batyr, Nur-Sultan 010000, Kazakhstan; (A.B.); (Z.A.); (M.J.); (A.A.); (C.M.); (D.T.)
| | - Arman Aitkulov
- Department of Computer and Electrical Engineering, Nazarbayev University, Kabanbay batyr, Nur-Sultan 010000, Kazakhstan; (A.B.); (Z.A.); (M.J.); (A.A.); (C.M.); (D.T.)
| | - Vassilis Inglezakis
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow G1 1XJ, UK;
| | - Wilfried Blanc
- Université Côte d’Azur, INPHYNI, CNRS UMR 7010, Parc Valrose, 06108 Nice, France;
| | - Paola Saccomandi
- Politechnico di Milano, Department of Mechanical Engineering, Giuseppe La Masa, 20156 Milano, Italy;
| | - Carlo Molardi
- Department of Computer and Electrical Engineering, Nazarbayev University, Kabanbay batyr, Nur-Sultan 010000, Kazakhstan; (A.B.); (Z.A.); (M.J.); (A.A.); (C.M.); (D.T.)
| | - Daniele Tosi
- Department of Computer and Electrical Engineering, Nazarbayev University, Kabanbay batyr, Nur-Sultan 010000, Kazakhstan; (A.B.); (Z.A.); (M.J.); (A.A.); (C.M.); (D.T.)
- Laboratory of Biosensors and Bioinstruments, National Laboratory of Astana, Kabanbay batyr, Nur-Sultan 010000, Kazakhstan
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Weiss J, Winkelmann MT, Gohla G, Kübler J, Clasen S, Nikolaou K, Hoffmann R. MR-guided microwave ablation in hepatic malignancies: clinical experiences from 50 procedures. Int J Hyperthermia 2020; 37:349-355. [PMID: 32286087 DOI: 10.1080/02656736.2020.1750713] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Purpose: To investigate technical success, technique efficacy, safety and outcome of MR-guided microwave ablation (MWA) in hepatic malignancies.Material and methods: In this prospective IRB-approved study, patients scheduled for percutaneous treatment of hepatic malignancies underwent MR-guided MWA in a closed-bore 1.5 T MR system. Technical success was assessed on post-procedural MR control imaging. Technique efficacy was evaluated 4 weeks after the procedure on multi-parametric MRI. Assessment of safety followed the Society of Interventional Radiology grading system. Kaplan-Meier survival estimates were calculated to evaluate overall survival (OS), time to local tumor progression (TLTP), and time to non-target progression (TNTP).Results: Between 2015 and 2019, 47 patients (60.5 ± 12.2 years; 39 male) underwent 50 procedures for 58 hepatic tumors (21 hepatocellular carcinomas; 37 metastases). Mean target tumor size was 16 ± 7mm (range: 6-39 mm). Technical success and technique efficacy were 100% and 98%, respectively. Lesions were treated using 2.6 applicator positions (range: 1-6). Mean energy, ablation duration per tumor, and procedure duration were 43.2 ± 23.5 kJ, 26.7 ± 13.1 min and 211.2 ± 68.7 min, respectively. 10 minor (20%) and 3 major (6%) complications were observed. Median post-interventional hospital admission was 1 day (range: 1-19 days). Median OS was 41.6 (IQR: 26.4-) months. Local recurrence occurred after 4 procedures (8%) with TLTP ranging between 3.1 and 41.9 months. Non-target recurrence was observed in 64% of patients after a median TNTP of 13.8 (IQR 2.3-) months.Conclusion: MR-guided MWA allows for safe and successful treatment of hepatic malignancies with a high technique efficacy however with relatively long procedure durations.
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Affiliation(s)
- Jakob Weiss
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Moritz T Winkelmann
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Georg Gohla
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Jens Kübler
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Stephan Clasen
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Rüdiger Hoffmann
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
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Gillies DJ, Bax J, Barker K, Gardi L, Kakani N, Fenster A. Geometrically variable three-dimensional ultrasound for mechanically assisted image-guided therapy of focal liver cancer tumors. Med Phys 2020; 47:5135-5146. [PMID: 32686142 DOI: 10.1002/mp.14405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/02/2020] [Accepted: 06/27/2020] [Indexed: 01/03/2023] Open
Abstract
PURPOSE Image-guided focal ablation procedures are first-line therapy options in the treatment of liver cancer tumors that provide advantageous reductions in patient recovery times and complication rates relative to open surgery. However, extensive physician training is required and image guidance variabilities during freehand therapy applicator placement limit the sufficiency of ablation volumes and the overall potential of these procedures. We propose the use of three-dimensional ultrasound (3D US) to provide guidance and localization of therapy applicators, augmenting current ablation therapies without the need for specialized procedure suites. We have developed a novel scanning mechanism for geometrically variable 3D US images, a mechanical tracking system, and a needle applicator insertion workflow using a custom needle applicator guide for targeted image-guided procedures. METHODS A three-motor scanner was designed to use any commercially available US probe to generate accurate, consistent, and geometrically variable 3D US images. The designed scanner was mounted on a counterbalanced stabilizing and mechanical tracking system for determining the US probe orientation, which was assessed using optical tracking. Further exploiting the utility of the motorized scanner, an image-guidance workflow was developed that moved the probe to any identified target within an acquired 3D US image. The complete 3D US guidance system was used to perform mock targeted interventional procedures on a phantom by selecting a target in a 3D US image, navigating to the target, and performing needle insertion using a custom 3D-printed needle applicator guide. Registered postinsertion 3D US images and cone-beam computed tomography (CBCT) images were used to evaluate tip targeting errors when using the motors, tracking system, or mixed navigation approaches. Two 3D US image geometries were investigated to assess the accuracy of a small-footprint tilt approach and a large field-of-view hybrid approach for a total of 48 targeted needle insertions. 3D US image quality was evaluated in a healthy volunteer and compared to a commercially available matrix array US probe. RESULTS A mean positioning error of 1.85 ± 1.33 mm was observed when performing compound joint manipulations with the mechanical tracking system. A combined approach for navigation that incorporated the motorized movement and the in-plane tracking system corrections performed the best with a mean tip error of 3.77 ± 2.27 mm and 4.27 ± 2.47 mm based on 3D US and CBCT images, respectively. No significant differences were observed between hybrid and tilt image acquisition geometries with all mean registration errors ≤1.2 mm. 3D US volunteer images resulted in clear reconstruction of clinically relevant anatomy. CONCLUSIONS A mechanically tracked system with geometrically variable 3D US provides a utility that enables enhanced applicator guidance, placement verification, and improved clinical workflow during focal liver tumor ablation procedures. Evaluations of the tracking accuracy, targeting capabilities, and clinical imaging feasibility of the proposed 3D US system, provided evidence for clinical translation. This system could provide a workflow for improving applicator placement and reducing local cancer recurrence during interventional procedures treating liver cancer and has the potential to be expanded to other abdominal interventions and procedures.
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Affiliation(s)
- Derek J Gillies
- Department of Medical Biophysics, Robarts Research Institute, Western University, London, ON, N6A 3K7, Canada.,Robarts Research Institute, Western University, London, ON, N6A 3K7, Canada
| | - Jeffery Bax
- Robarts Research Institute, Western University, London, ON, N6A 3K7, Canada
| | - Kevin Barker
- Robarts Research Institute, Western University, London, ON, N6A 3K7, Canada
| | - Lori Gardi
- Robarts Research Institute, Western University, London, ON, N6A 3K7, Canada
| | - Nirmal Kakani
- Department of Radiology, Manchester Royal Infirmary, Manchester, M13 9WL, UK
| | - Aaron Fenster
- Department of Medical Biophysics, Robarts Research Institute, Western University, London, ON, N6A 3K7, Canada.,Robarts Research Institute, Western University, London, ON, N6A 3K7, Canada
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21
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Sengupta S. Modeling of active shimming of metallic needles for interventional MRI. Magn Reson Med 2020; 84:2858-2870. [PMID: 32597521 DOI: 10.1002/mrm.28320] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 01/01/2023]
Abstract
PURPOSE Artifacts caused by large magnetic susceptibility differences between metallic needles and tissue are a persistent problem in many interventional MRI applications. The signal void caused by the needle can hide procedure targets and prevent accurate image-based monitoring. In this paper, a solution to this problem is presented in the form of an active shim insert inspired from degaussing coils used in naval vessels, that is designed to correct the field disturbance (ΔB0 ) caused by the needle. METHODS The ΔB0 induced by a 10 gauge hollow single-beveled titanium needle at 3T is modeled in different orientations. A set of 63 orthogonal coil pairs with unique tip paths are evaluated for shimming performance, and an optimal coil pair is chosen. Shimming performance and current demands are evaluated over a range of needle orientations. RESULTS Robust correction of the titanium needle induced ΔB0 is predicted using a flat no-loop coil combined with an orthogonal 1½ turn loop coil angled at the bevel angle for most orientations, with currents well below 1 amp per coil. Reductions in ΔB0 standard deviations with shimming ranged from ~49% to ~10% depending on needle orientation, with performance worsening as the needle is aligned more along B0 . CONCLUSION Simulations predict that it is possible to minimize metallic probe induced ΔB0 and signal losses using externally supplied direct current shim coil inserts in arbitrary orientations for potential benefits in many interventional MRI applications.
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Affiliation(s)
- Saikat Sengupta
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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22
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Winkelmann MT, Archid R, Gohla G, Hefferman G, Kübler J, Weiss J, Clasen S, Nikolaou K, Nadalin S, Hoffmann R. MRI-guided percutaneous thermoablation in combination with hepatic resection as parenchyma-sparing approach in patients with primary and secondary hepatic malignancies: single center long-term experience. Cancer Imaging 2020; 20:37. [PMID: 32460898 PMCID: PMC7251813 DOI: 10.1186/s40644-020-00316-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 05/18/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Combination therapy using hepatic resection (HR) and intra-operative thermal ablation is a treatment approach for patients with technically unresectable liver malignancies. The aim of this study was to investigate safety, survival and local recurrence rates for patients with technically unresectable liver tumors undergoing HR and separate percutaneous MR-guided thermoablation procedure as an alternative approach. METHODS Data from all patients with primary or secondary hepatic malignancies treated at a single institution between 2004 and 2018 with combined HR and MR-guided percutaneous thermoablation was collected and retrospectively analyzed. Complications, procedure related information and patient characteristics were collected from institutional records. Overall survival and disease-free survival were estimated using the Kaplan-Meier method. RESULTS A total of 31 patients (age: 62.8 ± 9.1 years; 10 female) with hepatocellular carcinoma (HCC; n = 7) or hepatic metastases (n = 24) were treated for 98 hepatic tumors. Fifty-six tumors (mean diameter 28.7 ± 23.0 mm) were resected. Forty-two tumors (15.1 ± 7.6 mm) were treated with MR-guided percutaneous ablation with a technical success rate of 100%. Local recurrence at the ablation site occurred in 7 cases (22.6%); none of these was an isolated local recurrence. Six of 17 patients (35.3%) treated for colorectal liver metastases developed local recurrence. Five patients developed recurrence at the resection site (16.1%). Non-local hepatic recurrence was observed in 18 cases (58.1%) and extrahepatic recurrence in 11 cases (35.5%) during follow-up (43.1 ± 26.4 months). Ten patients (32.3%) developed complications after HR requiring pharmacological or interventional treatment. No complication requiring therapy was observed after ablation. Median survival time was 44.0 ± 7.5 months with 1-,3-, 5-year overall survival rates of 93.5, 68.7 and 31.9%, respectively. The 1-, 3- and 5-year disease-free survival rates were 38.7, 19.4 and 9.7%, respectively. CONCLUSION The combination of HR and MR-guided thermoablation is a safe and effective approach in the treatment of technically unresectable hepatic tumors and can achieve long-term survival.
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Affiliation(s)
- Moritz T Winkelmann
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany.
| | - Rami Archid
- Department of General, Visceral and Transplant Surgery, University Hospital Tuebingen, Tübingen, Germany
| | - Georg Gohla
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Gerald Hefferman
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany.,Harvard Medical School, Harvard University, Boston, MA, USA
| | - Jens Kübler
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Jakob Weiss
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Stephan Clasen
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Konstantin Nikolaou
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
| | - Silvio Nadalin
- Department of General, Visceral and Transplant Surgery, University Hospital Tuebingen, Tübingen, Germany
| | - Rüdiger Hoffmann
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Straße 3, 72076, Tübingen, Germany
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Practical implementation of robust MR-thermometry during clinical MR-guided microwave ablations in the liver at 1.5 T. Phys Med 2019; 67:91-99. [PMID: 31704392 DOI: 10.1016/j.ejmp.2019.10.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 10/01/2019] [Accepted: 10/04/2019] [Indexed: 12/22/2022] Open
Abstract
Practical non-invasive equipment modifications and effective acquisition methods to achieve robust and reliable real-time MR thermometry for monitoring of clinical hepatic microwave ablations were implemented. These included selection of the microwave generator location (inside versus outside the MR scan room), the number of radiofrequency chokes added to the microwave generator's coaxial lines, and the use of copper wool to maximize their electrical grounding. Signal-to-noise ratio (SNR) of MR thermometry images of a small fluid-filled phantom acquired during activation of microwave antenna were used to evaluate image quality as a function of each modification. SNR measurements corresponding to both locations of the microwave generator were comparable and so it was located outside the MR scan room. For this location, addition of one RF choke on the power and four chokes on the sensor coaxial lines was found to be optimal, corresponding to a 68% increase in SNR. Furthermore, image quality strongly depended on the proper electrical grounding of the power and sensor lines. SNR ratio (relative to SNR of baseline images) during activation of microwave generator was found to be 0.49 ± 0.28 without adequate grounding, and 0.88 ± 0.08 with adequate grounding (p = 0.002, Student's t-test). These SNR measurements were sufficiently sensitive to detect issues related to equipment performance and hence formed part of the quality assurance testing performed prior to each clinical treatment. Incorporating these non-invasive approaches resulted in significant improvements to image quality and, importantly while maintaining the clinical integrity of the microwave system which is of paramount importance in a highly regulated healthcare environment.
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Bazrafshan B, Koujan A, Hübner F, Leithäuser C, Siedow N, Vogl TJ. A thermometry software tool for monitoring laser-induced interstitial thermotherapy. ACTA ACUST UNITED AC 2019; 64:449-457. [PMID: 30243013 DOI: 10.1515/bmt-2017-0197] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 08/21/2018] [Indexed: 11/15/2022]
Abstract
The purpose of this study was to develop a thermometry software tool for temperature monitoring during laser-induced interstitial thermotherapy (LITT). C++ programming language and several libraries including DICOM Toolkit, Grassroots DICOM library, Insight Segmentation and Registration Toolkit, Visualization Toolkit and Quasar Toolkit were used. The software's graphical user interface creates windows displaying the temperature map and the coagulation extent in the tissue, determined by the magnetic resonance imaging (MRI) thermometry with the echo planar imaging sequence and a numerical simulation based on the radiation and heat transfer in biological tissues, respectively. The software was evaluated applying the MRI-guided LITT to ex vivo pig liver and simultaneously measuring the temperature through a fiber-optic thermometer as reference. Using the software, the temperature distribution determined by the MRI method was compared with the coagulation extent simulation. An agreement was shown between the MRI temperature map and the simulated coagulation extent. Furthermore, the MRI-based and simulated temperatures agreed with the measured one - a correlation coefficient of 0.9993 and 0.9996 was obtained, respectively. The precision of the MRI temperature amounted to 2.4°C. In conclusion, the software tool developed in the present study can be applied for monitoring and controlling the LITT procedure in ex vivo tissues.
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Affiliation(s)
- Babak Bazrafshan
- Universitätsklinikum Frankfurt, Institut für Diagnostische und Interventionelle Radiologie (IDIR), Theodor-Stern-Kai 7, Frankfurt am Main 60590, Germany, Phone: +49 69 6301 4793, Fax: +49 69 6301 7258
| | - Ahmad Koujan
- Universitätsklinikum Frankfurt, Institut für Diagnostische und Interventionelle Radiologie (IDIR), Theodor-Stern-Kai 7, Frankfurt am Main 60590, Germany
| | - Frank Hübner
- Universitätsklinikum Frankfurt, Institut für Diagnostische und Interventionelle Radiologie (IDIR), Theodor-Stern-Kai 7, Frankfurt am Main 60590, Germany
| | - Christian Leithäuser
- Fraunhofer-Institut für Techno- und Wirtschaftsmathematik (ITWM), Fraunhofer-Platz 1, Kaiserslautern 67663, Germany
| | - Norbert Siedow
- Fraunhofer-Institut für Techno- und Wirtschaftsmathematik (ITWM), Fraunhofer-Platz 1, Kaiserslautern 67663, Germany
| | - Thomas J Vogl
- Universitätsklinikum Frankfurt, Institut für Diagnostische und Interventionelle Radiologie (IDIR), Theodor-Stern-Kai 7, Frankfurt am Main 60590, Germany
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25
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Volpi S, Tsoumakidou G, Loriaud A, Hocquelet A, Duran R, Denys A. Electromagnetic navigation system combined with High-Frequency-Jet-Ventilation for CT-guided hepatic ablation of small US-Undetectable and difficult to access lesions. Int J Hyperthermia 2019; 36:1051-1057. [DOI: 10.1080/02656736.2019.1671612] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- Stephanie Volpi
- Department of Radiology, Centre Hospitalo-Universitaire Vaudois, Interventional Radiology Unit, Lausanne, Switzerland
- Department of Radiology, Institut de Cancerologie de l’Ouest-René Gauducheau, Saint Herblain Cedex, France
| | - Georgia Tsoumakidou
- Department of Radiology, Centre Hospitalo-Universitaire Vaudois, Interventional Radiology Unit, Lausanne, Switzerland
| | - Amélie Loriaud
- Department of Radiology, Centre Hospitalo-Universitaire Vaudois, Interventional Radiology Unit, Lausanne, Switzerland
| | - Arnaud Hocquelet
- Department of Radiology, Centre Hospitalo-Universitaire Vaudois, Interventional Radiology Unit, Lausanne, Switzerland
| | - Rafael Duran
- Department of Radiology, Centre Hospitalo-Universitaire Vaudois, Interventional Radiology Unit, Lausanne, Switzerland
| | - Alban Denys
- Department of Radiology, Centre Hospitalo-Universitaire Vaudois, Interventional Radiology Unit, Lausanne, Switzerland
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26
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Instant Outcome Evaluation of Microwave Ablation With Subtraction CT in an In Vivo Porcine Model. Invest Radiol 2019; 54:333-339. [DOI: 10.1097/rli.0000000000000545] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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27
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Wilson SR, Shinde S, Appleby I, Boscoe M, Conway D, Dryden C, Ferguson K, Gedroyc W, Kinsella SM, Nathanson MH, Thorne J, White M, Wright E. Guidelines for the safe provision of anaesthesia in magnetic resonance units 2019. Anaesthesia 2019; 74:638-650. [DOI: 10.1111/anae.14578] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2018] [Indexed: 01/02/2023]
Affiliation(s)
- S. R. Wilson
- Department of Neuro‐anaesthesia and Neurocritical Care National Hospital for Neurology and Neurosurgery LondonUK and Neuro Anaesthesia and Critical Care Society of Great Britain and Ireland (Co‐Chair)
| | - S. Shinde
- Department of Anaesthesia North Bristol NHS Trust BristolUK and Vice President, Association of Anaesthetists (Co‐Chair)
| | - I. Appleby
- Department of Neuro‐anaesthesia and Neurocritical Care National Hospital for Neurology and Neurosurgery LondonUK and Neuro Anaesthesia and Critical Care Society of Great Britain and Ireland
| | - M. Boscoe
- Royal College of Anaesthetists LondonUK and Society of Anaesthetists in Radiology
| | - D. Conway
- Department of Anaesthesia Chelsea and Westminster Hospital LondonUK and Trainee Committee, Association of Anaesthetists
| | - C. Dryden
- Jackson Rees Department of Paediatric Anaesthesia Alder Hey Children's Hospital LiverpoolUK and Association of Paediatric Anaesthetists of Great Britain and Ireland
| | - K. Ferguson
- Department of Anaesthesia Aberdeen Royal Infirmary Aberdeen UK and Association of Anaesthetists Safety Representative
| | - W. Gedroyc
- Imperial College LondonUK and Royal College of Radiologists
| | - S. M. Kinsella
- Department of Anaesthesia St Michaels Hospital BristolUK and Editor, Anaesthesia
| | - M. H. Nathanson
- Department of Anaesthesia Nottingham University Hospital NottinghamUK and Immediate Past Honorary Secretary, Association of Anaesthetists
| | - J. Thorne
- Department of Neurosurgery Salford Royal Foundation Trust SalfordUK and Society of British Neurological Surgeons
| | | | - E. Wright
- Jackson Rees Department of Paediatric Anaesthesia Alder Hey Children's Hospital Liverpool UK
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Scapaticci R, Lopresto V, Pinto R, Cavagnaro M, Crocco L. Monitoring Thermal Ablation via Microwave Tomography: An Ex Vivo Experimental Assessment. Diagnostics (Basel) 2018; 8:E81. [PMID: 30563280 PMCID: PMC6316129 DOI: 10.3390/diagnostics8040081] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/27/2018] [Accepted: 12/02/2018] [Indexed: 12/19/2022] Open
Abstract
Thermal ablation treatments are gaining a lot of attention in the clinics thanks to their reduced invasiveness and their capability of treating non-surgical patients. The effectiveness of these treatments and their impact in the hospital's routine would significantly increase if paired with a monitoring technique able to control the evolution of the treated area in real-time. This is particularly relevant in microwave thermal ablation, wherein the capability of treating larger tumors in a shorter time needs proper monitoring. Current diagnostic imaging techniques do not provide effective solutions to this issue for a number of reasons, including economical sustainability and safety. Hence, the development of alternative modalities is of interest. Microwave tomography, which aims at imaging the electromagnetic properties of a target under test, has been recently proposed for this scope, given the significant temperature-dependent changes of the dielectric properties of human tissues induced by thermal ablation. In this paper, the outcomes of the first ex vivo experimental study, performed to assess the expected potentialities of microwave tomography, are presented. The paper describes the validation study dealing with the imaging of the changes occurring in thermal ablation treatments. The experimental test was carried out on two ex vivo bovine liver samples and the reported results show the capability of microwave tomography of imaging the transition between ablated and untreated tissue. Moreover, the discussion section provides some guidelines to follow in order to improve the achievable performances.
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Affiliation(s)
- Rosa Scapaticci
- National Research Council of Italy-Institute for the Electromagnetic Sensing of the Environment, 80124 Napoli, Italy.
| | - Vanni Lopresto
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Division of Health Protection Technologies, Casaccia Research Center, 00123 Rome, Italy.
| | - Rosanna Pinto
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Division of Health Protection Technologies, Casaccia Research Center, 00123 Rome, Italy.
| | - Marta Cavagnaro
- Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, 00184 Rome, Italy.
| | - Lorenzo Crocco
- National Research Council of Italy-Institute for the Electromagnetic Sensing of the Environment, 80124 Napoli, Italy.
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Weiss J, Hoffmann R, Rempp H, Keβler DE, Pereira PL, Nikolaou K, Clasen S. Feasibility, efficacy, and safety of percutaneous MR-guided ablation of small (≤12 mm) hepatic malignancies. J Magn Reson Imaging 2018; 49:374-381. [PMID: 30221797 DOI: 10.1002/jmri.26252] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 06/26/2018] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Percutaneous tumor ablation is commonly performed using computed tomography (CT) or ultrasound (US) guidance, although reliable visualization of the target tumor may be challenging. MRI guidance provides more reliable visualization of target tumors and allows for real-time imaging and multiplanar capabilities, making it the modality of choice, in particular if lesions are small. PURPOSE To investigate the feasibility, technical success, and safety of percutaneous MR-guided ablation (RFA n = 27 / MWA n = 16) of small (≤12 mm) hepatic malignancies. STUDY TYPE Retrospective case study. POPULATION In all, 45 patients (age: 61.1 ± 11.8) with hepatic malignancies and a lesion diameter of ≤12 mm scheduled for percutaneous MR-guided tumor ablation based on a tumor board decision were included. FIELD STRENGTH A 1.5T MR system was used for planning, targeting, and monitoring. ASSESSMENT Feasibility assessment included the detection of the target tumor, tumor delineation during MR-fluoroscopy guided targeting, and the number of attempts needed for precise applicator placement. Technical success was defined as successful performance of the procedure including a safety margin of 5 mm. Safety evaluation was based on procedure-related complications. STATISTICAL TEST Frequency. RESULTS Tumor ablation (mean diameter 9.0 ± 2.1 mm) was successfully completed in 43/45 patients. Planning imaging was conducted without a contrast agent in 79% (n = 37). In 64% (n = 30), the target tumors were visible with MR-fluoroscopy. In six patients (13%), planning imaging revealed new, unexpected small lesions, which were either treated in the same session (n = 4) or changed therapy management (n = 2) due to diffuse tumor progress. Postprocedural imaging revealed a technical success of 100% (43/43), with no major complications. During follow-up, no local tumor progression was observed (mean follow-up 24.7 ± 14.0 months) although 28% (12) patients developed new hepatic lesions distant to the ablation zone. No major complications were observed. DATA CONCLUSION MR-guided ablation is a feasible approach for an effective and safe treatment of small hepatic malignancies. LEVEL OF EVIDENCE 4 Technical Efficacy: Stage 4 J. Magn. Reson. Imaging 2019;49:374-381.
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Affiliation(s)
- Jakob Weiss
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Rüdiger Hoffmann
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Hansjoerg Rempp
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - David-Emanuel Keβler
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Philippe L Pereira
- Department of Radiology, Minimally Invasive Therapies and Nuclearmedicine, SLK-Kliniken Heilbronn GmbH, Heilbronn, Germany
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
| | - Stephan Clasen
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Tuebingen, Germany
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Affiliation(s)
- Jakob Weiss
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Tuebingen, Germany
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Dong J, Geng X, Yang Y, Cai X, Hu P, Xia L, Zhang B, Wu P. Dynamic imaging and pathological changes in pig liver after MR-guided microwave ablation. BMC Cancer 2018; 18:397. [PMID: 29625559 PMCID: PMC5889530 DOI: 10.1186/s12885-018-4157-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 02/20/2018] [Indexed: 01/30/2023] Open
Abstract
Background Magnetic resonance (MR)-guided microwave ablation is a well-developed technique for the treatment of tumors, especially hepatic carcinomas. However, there are no detailed reports on the changes in the MR images and histology observed after the ablation. This study aimed to dynamically map the pathological changes after ablation and the changes occurring on MR images. Methods We performed MR-guided microwave ablation in 10 Wuzhishan pigs and obtained an MR scan immediately after ablation (0 weeks) and at 1, 2, 3, and 4 weeks after ablation. We compared the ablation assessed on MR images to tissue specimens obtained during follow-up. Results We found no significant difference in the ablation size between MR images and tissue specimens; the mean length and width of the ablated zone were 4.27 cm and 2.42 cm, respectively, on MR images and 4.26 cm and 2.45 cm, respectively, on specimens (P > 0.05). Immediately after ablation, carbonization and cavities were observed in the center of the ablation zone. Surrounding layer cells were necrotic but maintained their original shapes. The outermost layer was inflamed, but gradually showed fibrotic characteristics. The MR images accurately reflected the exact histological tissue changes after the ablation procedure. Conclusion The dynamic imaging and pathological features of liver ablation outlined in this study will provide a useful reference for patient follow-up after MR-guided microwave ablation. Electronic supplementary material The online version of this article (10.1186/s12885-018-4157-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jun Dong
- Department of Integrated Therapy in Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, People's Republic of China
| | - Xiaojing Geng
- Department of Aging Medicine, the Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, People's Republic of China
| | - Yadi Yang
- Department of Medical Imaging & Image Guided Therapy, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, East Dong Feng Road 651, Guangzhou, Guangdong, 510060, People's Republic of China
| | - Xiuyu Cai
- Department of Integrated Therapy in Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, People's Republic of China
| | - Pili Hu
- Department of Integrated Therapy in Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, People's Republic of China
| | - Liangping Xia
- Department of Integrated Therapy in Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, People's Republic of China
| | - Bei Zhang
- Department of Integrated Therapy in Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, People's Republic of China
| | - Peihong Wu
- Department of Medical Imaging & Image Guided Therapy, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, East Dong Feng Road 651, Guangzhou, Guangdong, 510060, People's Republic of China.
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Kessler DE, Weiss J, Rempp H, Pereira PL, Nikolaou K, Clasen S, Hoffmann R. In vitro artifact assessment of an MR-compatible, microwave antenna device for percutaneous tumor ablation with fluoroscopic MRI-sequences. MINIM INVASIV THER 2017; 27:60-68. [PMID: 29231067 DOI: 10.1080/13645706.2017.1414062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To evaluate artifact configuration and diameters of a magnetic resonance (MR) compatible microwave (MW) applicator using near-realtime MR-fluoroscopic sequences for percutaneous tumor ablation procedures. MATERIAL AND METHODS Two MW applicators (14 G and 16 G) were tested in an ex-vivo phantom at 1.5 T with two 3 D fluoroscopic sequences: T1-weighted spoiled Gradient Echo (GRE) and T1/T2-weighted Steady State Free Precession (SSFP) sequence. Applicator orientation to main magnetic field (B0), slice orientation and phase encoding direction (PED) were systematically varied. The influence of these variables was assessed with ANOVA and post-hoc testing. RESULTS The artifact was homogenous along the whole length of both antennas with all tested parameters. The tip artifact diameter of the 16 G antenna measured 6.9 ± 1.0 mm, the shaft artifact diameter 8.6 ± 1.2 mm and the Tip Location Error (TLE) was 1.5 ± 1.2 mm.The tip artifact diameter of the 14 G antenna measured 7.7 ± 1.2 mm, the shaft artifact diameter 9.6 ± 1.5 mm and TLE was 1.6 ± 1.2 mm. Orientation to B0 had no statistically significant influence on tip artifact diameters (16 G: p = .55; 14 G: p = .07) or TLE (16 G: p = .93; 14 G: p = .26). GRE sequences slightly overestimated the antenna length with TLE(16 G) = 2.6 ± 0.5 mm and TLE(14 G) = 2.7 ± 0.7 mm. CONCLUSIONS The MR-compatible MW applicator's artifact seems adequate with an acceptable TLE for safe applicator positioning during near-realtime fluoroscopic MR-guidance.
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Affiliation(s)
- David-Emanuel Kessler
- a Department of Diagnostic and Interventional Radiology , Eberhard Karls University , Tuebingen , Germany
| | - Jakob Weiss
- a Department of Diagnostic and Interventional Radiology , Eberhard Karls University , Tuebingen , Germany
| | - Hansjörg Rempp
- a Department of Diagnostic and Interventional Radiology , Eberhard Karls University , Tuebingen , Germany
| | - Philippe L Pereira
- b Department of Radiology, Minimally Invasive Therapies and Nuclear Medicine , SLK-Kliniken Heilbronn , Heilbronn , Germany
| | - Konstantin Nikolaou
- a Department of Diagnostic and Interventional Radiology , Eberhard Karls University , Tuebingen , Germany
| | - Stephan Clasen
- a Department of Diagnostic and Interventional Radiology , Eberhard Karls University , Tuebingen , Germany
| | - Rüdiger Hoffmann
- a Department of Diagnostic and Interventional Radiology , Eberhard Karls University , Tuebingen , Germany
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Arnolli MM, Buijze M, Franken M, de Jong KP, Brouwer DM, Broeders IAMJ. System for CT-guided needle placement in the thorax and abdomen: A design for clinical acceptability, applicability and usability. Int J Med Robot 2017; 14. [PMID: 29205787 DOI: 10.1002/rcs.1877] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/16/2017] [Accepted: 10/16/2017] [Indexed: 01/11/2023]
Abstract
BACKGROUND Various systems exist for CT-guided needle placement in the thorax and abdomen, but widespread adoption is lacking. The goal of this work is to develop a system for precise needle placement with a design focus on clinical acceptability, applicability and usability. METHODS A system was outlined incorporating a needle guide on a mechanism with a remote centre of motion, manually placeable around the patient at the desired entry point and lockable by push-button to the CT table. System and patient are scanned for system-to-CT registration and target specification. The needle guide is automatically aimed at the target, for manual needle insertion to specified depth. RESULTS A fully functional prototype was realized, achieving 1.2±0.6 mm placement error at 79.0±8.4 mm depth and 2.1±0.7 mm at 156.0±6.9 mm for 2×12 in- and out-of-plane punctures in a gelatin phantom. CONCLUSIONS The system enables precise needle placement in a single insertion and is ready for its first clinical deployment.
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Affiliation(s)
- Maarten M Arnolli
- DEMCON Advanced Mechatronics, the Netherlands.,Precision Engineering, Science-based Engineering, University of Twente, the Netherlands
| | | | | | - Koert P de Jong
- Department of Hepato-Pancreato-Biliary Surgery & Liver Transplantation, University Medical Center Groningen, the Netherlands
| | - Dannis M Brouwer
- Precision Engineering, Science-based Engineering, University of Twente, the Netherlands
| | - Ivo A M J Broeders
- Minimally Invasive Surgery & Robotics, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, the Netherlands
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Ziv O, Goldberg SN, Nissenbaum Y, Sosna J, Weiss N, Azhari H. Optical flow and image segmentation analysis for noninvasive precise mapping of microwave thermal ablation in X-ray CT scans - ex vivo study. Int J Hyperthermia 2017; 34:744-755. [PMID: 28866952 DOI: 10.1080/02656736.2017.1375160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
PURPOSE To develop image processing algorithms for noninvasive mapping of microwave thermal ablation using X-ray CT. METHODS Ten specimens of bovine liver were subjected to microwave ablation (20-80 W, 8 min) while scanned by X-ray CT at 5 s intervals. Specimens were cut and manually traced by two observers. Two algorithms were developed and implemented to map the ablation zone. The first algorithm utilises images segmentation of Hounsfield units changes (ISHU). The second algorithm utilises radial optical flow (ROF). Algorithm sensitivity to spatiotemporal under-sampling was assessed by decreasing the acquisition rate and reducing the number of acquired projections used for image reconstruction in order to evaluate the feasibility of implementing radiation reduction techniques. RESULTS The average radial discrepancy between the ISHU and ROF contours and the manual tracing were 1.04±0.74 and 1.16±0.79mm, respectively. When diluting the input data, the ISHU algorithm retained its accuracy, ranging from 1.04 to 1.79mm. By contrast, the ROF algorithm performance became inconsistent at low acquisition rates. Both algorithms were not sensitive to projections reduction, (ISHU: 1.24±0.83mm, ROF: 1.53±1.15mm, for reduction by eight fold). Ablations near large blood vessels affected the ROF algorithm performance (1.83±1.30mm; p < 0.01), whereas ISHU performance remained the same. CONCLUSION The two suggested noninvasive ablation mapping algorithms can provide highly accurate contouring of the ablation zone at low scan rates. The ISHU algorithm may be more suitable for clinical practice as it appears more robust when radiation dose reduction strategies are employed and when the ablation zone is near large blood vessels.
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Affiliation(s)
- Omri Ziv
- a Department of Biomedical Engineering , Technion - IIT , Haifa , Israel
| | - S Nahum Goldberg
- b Department of Radiology , Hadassah Medical Center, Hebrew University , Jerusalem , Israel.,c Department of Radiology , Beth Israel Deaconess Medical Center , Boston , MA , USA
| | - Yitzhak Nissenbaum
- b Department of Radiology , Hadassah Medical Center, Hebrew University , Jerusalem , Israel
| | - Jacob Sosna
- b Department of Radiology , Hadassah Medical Center, Hebrew University , Jerusalem , Israel.,c Department of Radiology , Beth Israel Deaconess Medical Center , Boston , MA , USA
| | - Noam Weiss
- a Department of Biomedical Engineering , Technion - IIT , Haifa , Israel
| | - Haim Azhari
- a Department of Biomedical Engineering , Technion - IIT , Haifa , Israel
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Sánchez Y, Anvari A, Samir AE, Arellano RS, Prabhakar AM, Uppot RN. Navigational Guidance and Ablation Planning Tools for Interventional Radiology. Curr Probl Diagn Radiol 2017; 46:225-233. [DOI: 10.1067/j.cpradiol.2016.11.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 11/08/2016] [Indexed: 12/14/2022]
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Hoffmann R, Kessler DE, Weiss J, Clasen S, Pereira PL, Nikolaou K, Rempp H. Preclinical evaluation of an MR-compatible microwave ablation system and comparison with a standard microwave ablation system in an ex vivo bovine liver model. Int J Hyperthermia 2017; 33:617-623. [DOI: 10.1080/02656736.2017.1284349] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
- Rüdiger Hoffmann
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - David-Emanuel Kessler
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Jakob Weiss
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Stephan Clasen
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Philippe L. Pereira
- Department of Radiology, Minimally Invasive Therapies and Nuclear Medicine, SLK-Kliniken Heilbronn GmbH, Heilbronn, Germany
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Hansjörg Rempp
- Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Tuebingen, Germany
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Alternate update of shifted extended keyholes (AUSEK): A new accelerating strategy for interventional MRI. Magn Reson Imaging 2016; 36:112-120. [PMID: 27989902 DOI: 10.1016/j.mri.2016.10.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 10/26/2016] [Indexed: 11/23/2022]
Abstract
Real-time or near-real-time acquisition plays a key role in providing immediate image guidance for interventional magnetic resonance imaging (iMRI). However, the requirement of accurate needle tip localization has made several accelerating techniques, like Keyhole imaging or sliding window reconstruction, difficult to be applied to iMRI. The purpose of this work was to further explore the possible ways of applying view sharing techniques to iMRI. Inspired by Keyhole imaging, we present an easy-to-implement accelerating strategy called "Alternate update of shifted extended keyholes (AUSEK)". In this method, the keyhole views are not only extended but also shifted towards either high-frequency edge to form two divisions in k-space. The divisions which are mirrored to each other along the center are alternately updated following a reference scan. By using simulations and experiments, we demonstrate that AUSEK could effectively preserve the spatial resolution of the image, especially of the needle, at a temporal acceleration rate of about 2.5. AUSEK was implemented online in an open-configuration low-field MR imaging system.
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Tatsui CE, Lee SH, Amini B, Rao G, Suki D, Oro M, Brown PD, Ghia AJ, Bhavsar S, Popat K, Rhines LD, Stafford RJ, Li J. Spinal Laser Interstitial Thermal Therapy. Neurosurgery 2016; 79 Suppl 1:S73-S82. [DOI: 10.1227/neu.0000000000001444] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Abstract
BACKGROUND:
Although surgery followed by radiation effectively treats metastatic epidural compression, the ideal surgical approach should enable fast recovery and rapid institution of radiation and systemic therapy directed at the primary tumor.
OBJECTIVE:
To assess spinal laser interstitial thermotherapy (SLITT) as an alternative to surgery monitored in real time by thermal magnetic resonance (MR) images.
METHODS:
Patients referred for spinal metastasis without motor deficits underwent MR-guided SLITT, followed by stereotactic radiosurgery. Clinical and radiological data were gathered prospectively, according to routine practice.
RESULTS:
MR imaging-guided SLITT was performed on 19 patients with metastatic epidural compression. No procedures were discontinued because of technical difficulties, and no permanent neurological injuries occurred. The median follow-up duration was 28 weeks (range 10-64 weeks). Systemic therapy was not interrupted to perform the procedures. The mean preoperative visual analog scale scores of 4.72 (SD ± 0.67) decreased to 2.56 (SD ± 0.71, P = .043) at 1 month and remained improved from baseline at 3.25 (SD ± 0.75, P = .021) 3 months after the procedure. The preoperative mean EQ-5D index for quality of life was 0.67 (SD ± 0.07) and remained without significant change at 1 month 0.79 (SD ± 0.06, P = .317) and improved at 3 months 0.83 (SD ± 0.06, P = .04) after SLITT. Follow-up MR imaging after 2 months revealed significant decompression of the neural component in 16 patients. However, 3 patients showed progression at follow-up, 1 was treated with surgical decompression and stabilization and 2 were treated with repeated SLITT.
CONCLUSION:
MR-guided SLITT can be both a feasible and safe alternative to separation surgery in carefully selected cases of spinal metastatic tumor epidural compression.
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Affiliation(s)
- Claudio E. Tatsui
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Sun-Ho Lee
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Behrang Amini
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Ganesh Rao
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Dima Suki
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Marilou Oro
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Paul D. Brown
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Amol J. Ghia
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Shreyas Bhavsar
- Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Keyuri Popat
- Department of Anesthesiology and Perioperative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Laurence D. Rhines
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - R. Jason Stafford
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jing Li
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
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Takeyama N, Vidhyarkorn S, Chung DJ, Siripongsakun S, Kim HJ, Lu DSK, Raman SS. Does hepatobiliary phase sequence qualitatively outperform unenhanced T1-weighted imaging in assessment of the ablation margin 24 hours after thermal ablation of hepatocellular carcinomas? Abdom Radiol (NY) 2016; 41:1942-55. [PMID: 27271219 DOI: 10.1007/s00261-016-0796-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
PURPOSE To retrospectively determine whether hepatobiliary phase (HBP) sequence outperforms unenhanced T1-weighted imaging (uT1wI) in distinguishing the ablation margin (AM) from hepatocellular carcinoma (HCC) 24 h after thermoablation. MATERIAL AND METHODS Ninety-one patients [mean age, 65.7 years; 68 M/23F] with 138 HCCs (>6 months follow-up) underwent pre- and postablation gadoxetate disodium-enhanced MRI. AM showed a hyperintense middle zone (MZ) surrounding central hypo- or hyperintense HCCs on uT1wI, and an intermediate-intense MZ encompassing central hypo- or hyperintense HCCs during HBP. The visible AM was defined as persistent MZ around HCCs, which were demarcated from MZ, or peripherally band encompassing MZ, which were not demarcated from HCC. The indefinite AM was defined as no demarcating HCCs from MZ. The ability to distinguish AM from HCC was classified as visible or indefinite on axial (ax)-uT1wI, ax-HBP, coronal (cor)-HBP, and combined all images. To investigate the AM visibility during HBP, significance of differences upon comparison of ax-uT1wI with combined images was analyzed. Preablation liver-tumor contrast ratio (LTCR) on ax-uT1wI and ax-HBP sequence is compared between the visible and indefinite AM. RESULTS The McNemar test demonstrated a significant increase (p < 0.05) in visible AM from ax-uT1wI (60), to ax-HBP (70), cor-HBP (79), and combined images (83). TLCR with visible AM was significantly higher than that with indefinite AM on ax-uT1wI (0.4 vs. 0.2, p = 0.001) and ax-HBP sequence (0.9 vs. 0.6, p = 0.004). CONCLUSIONS HBP sequence might have higher feasibility to distinguish AM from tumor than ax-uT1wI. The TLCR value in visible AM was higher than that in indefinite AM on both ax-uT1wI and ax-HBP sequences.
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Lopresto V, Pinto R, Farina L, Cavagnaro M. Treatment planning in microwave thermal ablation: clinical gaps and recent research advances. Int J Hyperthermia 2016; 33:83-100. [PMID: 27431328 DOI: 10.1080/02656736.2016.1214883] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Microwave thermal ablation (MTA) is a minimally invasive therapeutic technique aimed at destroying pathologic tissues through a very high temperature increase induced by the absorption of an electromagnetic field at microwave (MW) frequencies. Open problems, which are delaying MTA applications in clinical practice, are mainly linked to the extremely high temperatures, up to 120 °C, reached by the tissue close to the antenna applicator, as well as to the ability of foreseeing and controlling the shape and dimension of the thermally ablated area. Recent research was devoted to the characterisation of dielectric, thermal and physical properties of tissue looking at their changes with the increasing temperature, looking for possible developments of reliable, automatic and personalised treatment planning. In this paper, a review of the recently obtained results as well as new unpublished data will be presented and discussed.
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Affiliation(s)
- V Lopresto
- a Division of Health Protection Technologies , Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA) , Rome , Italy
| | - R Pinto
- a Division of Health Protection Technologies , Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA) , Rome , Italy
| | - L Farina
- b Department of Information Engineering, Electronics and Telecommunications , Sapienza University of Rome , Rome , Italy
| | - M Cavagnaro
- b Department of Information Engineering, Electronics and Telecommunications , Sapienza University of Rome , Rome , Italy
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Closed-Bore Interventional MRI: Percutaneous Biopsies and Ablations. AJR Am J Roentgenol 2015; 205:W400-10. [DOI: 10.2214/ajr.15.14732] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Dong J, Zhang L, Li W, Mao S, Wang Y, Wang D, Shen L, Dong A, Wu P. 1.0 T open-configuration magnetic resonance-guided microwave ablation of pig livers in real time. Sci Rep 2015; 5:13551. [PMID: 26315365 PMCID: PMC4551954 DOI: 10.1038/srep13551] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 07/01/2015] [Indexed: 12/12/2022] Open
Abstract
The current fastest frame rate of each single image slice in MR-guided ablation is 1.3 seconds, which means delayed imaging for human at an average reaction time: 0.33 seconds. The delayed imaging greatly limits the accuracy of puncture and ablation, and results in puncture injury or incomplete ablation. To overcome delayed imaging and obtain real-time imaging, the study was performed using a 1.0-T whole-body open configuration MR scanner in the livers of 10 Wuzhishan pigs. A respiratory-triggered liver matrix array was explored to guide and monitor microwave ablation in real-time. We successfully performed the entire ablation procedure under MR real-time guidance at 0.202 s, the fastest frame rate for each single image slice. The puncture time ranged from 23 min to 3 min. For the pigs, the mean puncture time was shorted to 4.75 minutes and the mean ablation time was 11.25 minutes at power 70 W. The mean length and widths were 4.62 ± 0.24 cm and 2.64 ± 0.13 cm, respectively. No complications or ablation related deaths during or after ablation were observed. In the current study, MR is able to guide microwave ablation like ultrasound in real-time guidance showing great potential for the treatment of liver tumors.
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Affiliation(s)
- Jun Dong
- Department of Medical Imaging &Image Guided Therapy, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; East Dong Feng Road 651, Guangzhou, Guangdong 510060, P. R. China
| | - Liang Zhang
- Department of Medical Imaging &Image Guided Therapy, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; East Dong Feng Road 651, Guangzhou, Guangdong 510060, P. R. China
| | - Wang Li
- Department of Medical Imaging &Image Guided Therapy, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; East Dong Feng Road 651, Guangzhou, Guangdong 510060, P. R. China
| | - Siyue Mao
- Department of Medical Imaging &Image Guided Therapy, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; East Dong Feng Road 651, Guangzhou, Guangdong 510060, P. R. China
| | - Yiqi Wang
- Department of Medical Imaging &Image Guided Therapy, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; East Dong Feng Road 651, Guangzhou, Guangdong 510060, P. R. China
| | - Deling Wang
- Department of Medical Imaging &Image Guided Therapy, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; East Dong Feng Road 651, Guangzhou, Guangdong 510060, P. R. China
| | - Lujun Shen
- Department of Medical Imaging &Image Guided Therapy, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; East Dong Feng Road 651, Guangzhou, Guangdong 510060, P. R. China
| | - Annan Dong
- Department of Medical Imaging &Image Guided Therapy, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; East Dong Feng Road 651, Guangzhou, Guangdong 510060, P. R. China
| | - Peihong Wu
- Department of Medical Imaging &Image Guided Therapy, Sun Yat-Sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; East Dong Feng Road 651, Guangzhou, Guangdong 510060, P. R. China
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Cone Beam Computed Tomography (CBCT) in the Field of Interventional Oncology of the Liver. Cardiovasc Intervent Radiol 2015; 39:8-20. [DOI: 10.1007/s00270-015-1180-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 06/27/2015] [Indexed: 12/21/2022]
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Abdel-Rehim M, Ronot M, Sibert A, Vilgrain V. Assessment of liver ablation using cone beam computed tomography. World J Gastroenterol 2015; 21:517-524. [PMID: 25593467 PMCID: PMC4292283 DOI: 10.3748/wjg.v21.i2.517] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 08/04/2014] [Accepted: 10/15/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the feasibility and accuracy of cone beam computed tomography (CBCT) in assessing the ablation zone after liver tumor ablation.
METHODS: Twenty-three patients (17 men and 6 women, range: 45-85 years old, mean age 65 years) with malignant liver tumors underwent ultrasound-guided percutaneous tumor ablation [radiofrequency (n = 14), microwave (n = 9)] followed by intravenous contrast-enhanced CBCT. Baseline multidetector computed tomography (MDCT) and peri-procedural CBCT images were compared. CBCT image quality was assessed as poor, good, or excellent. Image fusion was performed to assess tumor coverage, and quality of fusion was rated as bad, good, or excellent. Ablation zone volumes on peri-procedural CBCT and post-procedural MDCT were compared using the non-parametric paired Wilcoxon t-test.
RESULTS: Rate of primary ablation effectiveness was 100%. There were no complications related to ablation. Local tumor recurrence and new liver tumors were found 3 mo after initial treatment in one patient (4%). The ablation zone was identified in 21/23 (91.3%) patients on CBCT. The fusion of baseline MDCT and peri-procedural CBCT images was feasible in all patients and showed satisfactory tumor coverage (at least 5-mm margin). CBCT image quality was poor, good, and excellent in 2 (9%), 8 (35%), and 13 (56%), patients respectively. Registration quality between peri-procedural CBCT and post-procedural MDCT images was good to excellent in 17/23 (74%) patients. The median ablation volume on peri-procedural CBCT and post-procedural MDCT was 30 cm3 (range: 4-95 cm3) and 30 cm3 (range: 4-124 cm3), respectively (P-value > 0.2). There was a good correlation (r = 0.79) between the volumes of the two techniques.
CONCLUSION: Contrast-enhanced CBCT after tumor ablation of the liver allows early assessment of the ablation zone.
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Ahmed M, Solbiati L, Brace CL, Breen DJ, Callstrom MR, Charboneau JW, Chen MH, Choi BI, de Baère T, Dodd GD, Dupuy DE, Gervais DA, Gianfelice D, Gillams AR, Lee FT, Leen E, Lencioni R, Littrup PJ, Livraghi T, Lu DS, McGahan JP, Meloni MF, Nikolic B, Pereira PL, Liang P, Rhim H, Rose SC, Salem R, Sofocleous CT, Solomon SB, Soulen MC, Tanaka M, Vogl TJ, Wood BJ, Goldberg SN. Image-guided tumor ablation: standardization of terminology and reporting criteria--a 10-year update. J Vasc Interv Radiol 2014; 25:1691-705.e4. [PMID: 25442132 PMCID: PMC7660986 DOI: 10.1016/j.jvir.2014.08.027] [Citation(s) in RCA: 336] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2013] [Revised: 02/11/2014] [Accepted: 03/26/2014] [Indexed: 12/12/2022] Open
Abstract
Image-guided tumor ablation has become a well-established hallmark of local cancer therapy. The breadth of options available in this growing field increases the need for standardization of terminology and reporting criteria to facilitate effective communication of ideas and appropriate comparison among treatments that use different technologies, such as chemical (eg, ethanol or acetic acid) ablation, thermal therapies (eg, radiofrequency, laser, microwave, focused ultrasound, and cryoablation) and newer ablative modalities such as irreversible electroporation. This updated consensus document provides a framework that will facilitate the clearest communication among investigators regarding ablative technologies. An appropriate vehicle is proposed for reporting the various aspects of image-guided ablation therapy including classification of therapies, procedure terms, descriptors of imaging guidance, and terminology for imaging and pathologic findings. Methods are addressed for standardizing reporting of technique, follow-up, complications, and clinical results. As noted in the original document from 2003, adherence to the recommendations will improve the precision of communications in this field, leading to more accurate comparison of technologies and results, and ultimately to improved patient outcomes.
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Affiliation(s)
- Muneeb Ahmed
- Department of Radiology, Beth Israel Deaconess Medical Center 1 Deaconess Rd, WCC-308B, Boston, MA 02215.
| | - Luigi Solbiati
- Department of Radiology, Ospedale Generale, Busto Arsizio, Italy
| | - Christopher L Brace
- Departments of Radiology, Biomedical Engineering, and Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - David J Breen
- Department of Radiology, Southampton University Hospitals, Southampton, England
| | | | | | - Min-Hua Chen
- Department of Ultrasound, School of Oncology, Peking University, Beijing, China
| | - Byung Ihn Choi
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
| | - Thierry de Baère
- Department of Imaging, Institut de Cancérologie Gustave Roussy, Villejuif, France
| | - Gerald D Dodd
- Department of Radiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Damian E Dupuy
- Department of Diagnostic Radiology, Rhode Island Hospital, Providence, Rhode Island
| | - Debra A Gervais
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - David Gianfelice
- Medical Imaging, University Health Network, Laval, Quebec, Canada
| | | | - Fred T Lee
- Department of Radiology, University of Wisconsin Hospital and Clinics, Madison, Wisconsin
| | - Edward Leen
- Department of Radiology, Royal Infirmary, Glasgow, Scotland
| | - Riccardo Lencioni
- Department of Diagnostic Imaging and Intervention, Cisanello Hospital, Pisa University Hospital and School of Medicine, University of Pisa, Pisa, Italy
| | - Peter J Littrup
- Department of Radiology, Karmonos Cancer Institute, Wayne State University, Detroit, Michigan
| | | | - David S Lu
- Department of Radiology, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - John P McGahan
- Department of Radiology, Ambulatory Care Center, UC Davis Medical Center, Sacramento, California
| | | | - Boris Nikolic
- Department of Radiology, Albert Einstein Medical Center, Philadelphia, Pennsylvania
| | - Philippe L Pereira
- Clinic of Radiology, Minimally-Invasive Therapies and Nuclear Medicine, Academic Hospital Ruprecht-Karls-University Heidelberg, Heilbronn, Germany
| | - Ping Liang
- Department of Interventional Ultrasound, Chinese PLA General Hospital, Beijing, China
| | - Hyunchul Rhim
- Department of Diagnostic Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Steven C Rose
- Department of Radiology, University of California, San Diego, San Diego, California
| | - Riad Salem
- Department of Radiology, Northwestern University, Chicago, Illinois
| | | | - Stephen B Solomon
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Michael C Soulen
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | | | - Thomas J Vogl
- Institute for Diagnostic and Interventional Radiology, University Hospital Frankfurt, Johann Wolfgang Goethe-University, Frankfurt, Germany
| | - Bradford J Wood
- Radiology and Imaging Science, National Institutes of Health, Bethesda, Maryland
| | - S Nahum Goldberg
- Department of Radiology, Image-Guided Therapy and Interventional Oncology Unit, Hadassah Hebrew University Medical Center, Jerusalem, Israel
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Ahmed M, Solbiati L, Brace CL, Breen DJ, Callstrom MR, Charboneau JW, Chen MH, Choi BI, de Baère T, Dodd GD, Dupuy DE, Gervais DA, Gianfelice D, Gillams AR, Lee FT, Leen E, Lencioni R, Littrup PJ, Livraghi T, Lu DS, McGahan JP, Meloni MF, Nikolic B, Pereira PL, Liang P, Rhim H, Rose SC, Salem R, Sofocleous CT, Solomon SB, Soulen MC, Tanaka M, Vogl TJ, Wood BJ, Goldberg SN. Image-guided tumor ablation: standardization of terminology and reporting criteria--a 10-year update. Radiology 2014; 273:241-60. [PMID: 24927329 DOI: 10.1148/radiol.14132958] [Citation(s) in RCA: 806] [Impact Index Per Article: 80.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Image-guided tumor ablation has become a well-established hallmark of local cancer therapy. The breadth of options available in this growing field increases the need for standardization of terminology and reporting criteria to facilitate effective communication of ideas and appropriate comparison among treatments that use different technologies, such as chemical (eg, ethanol or acetic acid) ablation, thermal therapies (eg, radiofrequency, laser, microwave, focused ultrasound, and cryoablation) and newer ablative modalities such as irreversible electroporation. This updated consensus document provides a framework that will facilitate the clearest communication among investigators regarding ablative technologies. An appropriate vehicle is proposed for reporting the various aspects of image-guided ablation therapy including classification of therapies, procedure terms, descriptors of imaging guidance, and terminology for imaging and pathologic findings. Methods are addressed for standardizing reporting of technique, follow-up, complications, and clinical results. As noted in the original document from 2003, adherence to the recommendations will improve the precision of communications in this field, leading to more accurate comparison of technologies and results, and ultimately to improved patient outcomes. Online supplemental material is available for this article .
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Affiliation(s)
- Muneeb Ahmed
- Department of Radiology, Beth Israel Deaconess Medical Center 1 Deaconess Rd, WCC-308B, Boston, MA 02215 (M.A.); Department of Radiology, Ospedale Generale, Busto Arsizio, Italy (L.S.); Departments of Radiology, Biomedical Engineering, and Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wis (C.L.B.); Department of Radiology, Southampton University Hospitals, Southampton, England (D.J.B.); Department of Radiology, Mayo Clinic, Rochester, Minn (M.R.C., J.W.C.); Department of Ultrasound, School of Oncology, Peking University, Beijing, China (M.H.C.); Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea (B.I.C.); Department of Imaging, Institut de Cancérologie Gustave Roussy, Villejuif, France (T.d.B.); Department of Radiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colo (G.D.D.); Department of Diagnostic Radiology, Rhode Island Hospital, Providence, RI (D.E.D.); Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Mass (D.A.G.); Medical Imaging, University Health Network, Laval, Quebec, Canada (D.G.); Imaging Department, the London Clinic, London, England (A.R.G.); Department of Radiology, University of Wisconsin Hospital and Clinics, Madison, Wis (F.T.L.); Department of Radiology, Royal Infirmary, Glasgow, Scotland (E.L.); Department of Diagnostic Imaging and Intervention, Cisanello Hospital, Pisa University Hospital and School of Medicine, University of Pisa, Pisa, Italy (R.L.); Department of Radiology, Karmonos Cancer Institute, Wayne State University, Detroit, Mich (P.J.L.); Busto Arsizio, Italy (T.L.); Department of Radiology, David Geffen School of Medicine at UCLA, Los Angeles, Calif (D.S.L.); Department of Radiology, Ambulatory Care Center, UC Davis Medical Center, Sacramento, Calif (J.P.M.); Department of Radiology, Ospedale Valduce, Como, Italy (M.F.M.); Department of Radiology, Albert Einstein Medical Center, Phil
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Research of electrosurgical ablation with antiadhesive functionalization on thermal and histopathological effects of brain tissues in vivo. BIOMED RESEARCH INTERNATIONAL 2014; 2014:182657. [PMID: 24967336 PMCID: PMC4055086 DOI: 10.1155/2014/182657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/23/2014] [Accepted: 04/23/2014] [Indexed: 11/17/2022]
Abstract
Thermal injury and tissue sticking are two major concerns in the electrosurgery. In the present study, the effect of lateral thermal injury caused by different electrosurgical electrodes on wound healing was investigated. An electrosurgical unit equipped with untreated (SS) and titanium oxide layer-coated (TiO2-coated) stainless steel needle-type electrodes was used to create lesions on the rat brain tissue. TiO2 layers were produced by radiofrequency plasma and magnetron sputtering in the form of amorphous (TO-SS-1), anatase (TO-SS-2), and rutile (TO-SS-3) phase. Animals were sacrificed for evaluations at 0, 2, 7, and 28 days postoperatively. TO-SS-3 electrodes generated lower levels of sticking tissue, and the thermographs showed that the recorded highest temperature in brain tissue from the TO-SS-3 electrode was significantly lower than in the SS electrode. The total injury area of brain tissue caused by TO-SS-1 and TO-SS-3 electrodes was significantly lower than that caused by SS electrodes at each time point. The results of the present study reveal that the plating of electrodes with a TiO2 film with rutile phases is an efficient method for improving the performance of electrosurgical units and should benefit wound healing.
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Mauri G, Porazzi E, Cova L, Restelli U, Tondolo T, Bonfanti M, Cerri A, Ierace T, Croce D, Solbiati L. Intraprocedural contrast-enhanced ultrasound (CEUS) in liver percutaneous radiofrequency ablation: clinical impact and health technology assessment. Insights Imaging 2014; 5:209-16. [PMID: 24563244 PMCID: PMC3999370 DOI: 10.1007/s13244-014-0315-7] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 01/20/2014] [Accepted: 01/24/2014] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES To assess the clinical and the economic impacts of intraprocedural use of contrast-enhanced ultrasound (CEUS) in patients undergoing percutaneous radiofrequency ablation for small (<2.5 cm) hepatocellular carcinomas. METHODS One hundred and forty-eight hepatocellular carcinomas in 93 patients were treated by percutaneous radiofrequency ablation and immediate assessment by intraprocedural CEUS. Clinical impact, cost effectiveness, and budget, organisational and equity impacts were evaluated and compared with standard treatment without intraprocedural CEUS using the health technology assessment approach. RESULTS Intraprocedural CEUS detected incomplete ablation in 34/93 (36.5 %) patients, who underwent additional treatment during the same session. At 24-h, complete ablation was found in 88/93 (94.6 %) patients. Thus, a second session of treatment was spared in 29/93 (31.1 %) patients. Cost-effectiveness analysis revealed an advantage for the use of intraprocedural CEUS in comparison with standard treatment (4,639 vs 6,592) with a 21.9 % reduction of the costs to treat the whole sample. Cost per patient for complete treatment was <euro> 4,609 versus <euro> 5,872 respectively. The introduction of intraprocedural CEUS resulted in a low organisational impact, and in a positive impact on equity CONCLUSIONS Intraprocedural use of CEUS has a relevant clinical impact, reducing the number of re-treatments and the related costs per patient. TEACHING POINTS • CEUS allows to immediately asses the result of ablation. • Intraprocedural CEUS decreases the number of second ablative sessions. • Intraprocedural CEUS may reduce cost per patient for complete treatment. • Use of intraprocedural CEUS may reduce hospital budget. • Its introduction has low organisational impact, and relevant impact on equity.
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Affiliation(s)
- Giovanni Mauri
- IRCCS Policlinico San Donato, Unit of Radiology, Piazza Malan 2-20097 San Donato Milanese, Milano, Italy,
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Stoltz A, Gagnière J, Dupré A, Rivoire M. Radiofrequency ablation for colorectal liver metastases. J Visc Surg 2014; 151 Suppl 1:S33-44. [PMID: 24582728 DOI: 10.1016/j.jviscsurg.2013.12.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The management of hepatic metastases from colorectal cancer (HMCRC) is multimodal including chemotherapy, surgical resection, radiation therapy, and focused destruction technologies. Radiofrequency ablation (RFA) is the most commonly used focused destruction technology. It represents a therapeutic option that may be potentially curative in cases where surgical excision is contra-indicated. It also increases the number of candidates for surgical resection among patients whose liver metastases were initially deemed unresectable. This article explains the techniques, indications, and results of radiofrequency ablation in the treatment of hepatic colorectal metastases.
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Affiliation(s)
- A Stoltz
- Département d'Oncologie Chirurgicale, Centre Léon-Bérard, 28, rue Laennec, 69008 Lyon, France
| | - J Gagnière
- Département d'Oncologie Chirurgicale, Centre Léon-Bérard, 28, rue Laennec, 69008 Lyon, France
| | - A Dupré
- Département d'Oncologie Chirurgicale, Centre Léon-Bérard, 28, rue Laennec, 69008 Lyon, France
| | - M Rivoire
- Département d'Oncologie Chirurgicale, Centre Léon-Bérard, 28, rue Laennec, 69008 Lyon, France.
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Zhang Y, White SB, Nicolai JR, Zhang Z, West DL, Kim DH, Goodwin AL, Miller FH, Omary RA, Larson AC. Multimodality imaging to assess immediate response to irreversible electroporation in a rat liver tumor model. Radiology 2014; 271:721-9. [PMID: 24555632 DOI: 10.1148/radiol.14130989] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
PURPOSE To compare changes on ultrasonographic (US), computed tomographic (CT), and magnetic resonance (MR) images after irreversible electroporation (IRE) ablation of liver and tumor tissues in a rodent hepatoma model. MATERIALS AND METHODS Studies received approval from the institutional animal care and use committee. Forty-eight rats were used, and N1-S1 tumors were implanted in 24. Rats were divided into groups and allocated for studies with each modality. Imaging was performed in normal liver tissues and tumors before and after IRE. MR imaging was performed in one group before and after IRE after hepatic vessel ligation. US images were graded to determine echogenicity changes, CT attenuation was measured (in Hounsfield units), and MR imaging signal-to-noise ratio (SNR) was measured before and after IRE. Student t test was used to compare attenuation and SNR measurements before and after IRE (P < .05 indicated a significant difference). RESULTS IRE ablation produced greater alterations to echogenicity in normal tissues than in tumors. Attenuation in ablated liver tissues was reduced compared with that in control tissues (P < .001), while small attenuation differences between ablated (42.11 HU ± 2.11) and control (45.14 HU ± 2.64) tumors trended toward significance (P = .052). SNR in ablated normal tissues was significantly altered after IRE (T1-weighted images: pre-IRE, 145.95 ± 24.32; post-IRE, 97.80 ± 18.03; P = .004; T2-weighted images, pre-IRE, 47.37 ± 18.31; post-IRE, 90.88 ± 37.15; P = .023). In tumors, SNR differences before and after IRE were not significant. No post-IRE signal changes were observed after hepatic vessel ligation. CONCLUSION IRE induces rapid changes on gray-scale US, unenhanced CT, and MR images. These changes are readily visible and may assist a performing physician to delineate ablation zones from the unablated surrounding parenchyma.
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Affiliation(s)
- Yue Zhang
- From the Department of Bioengineering, University of Illinois at Chicago, Chicago, Ill (Y.Z., A.C.L.); Department of Radiology (Y.Z., S.B.W., J.R.N., Z.Z., D.L.W., D.H.K., A.L.G., F.H.M., R.A.O., A.C.L.) and Robert H. Lurie Comprehensive Cancer Center (A.C.L.), Northwestern University, 737 N Michigan Ave, Suite 1600, Chicago, IL 60611; Department of Radiology, Medical College of Wisconsin, Milwaukee, Wis (S.B.W.); and Department of Biomedical Engineering, Northwestern University, Evanston, Ill (A.C.L.)
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