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Hübner F, Klaus M, Siedow N, Leithäuser C, Vogl TJ. CT-based evaluation of tissue expansion in cryoablation of ex vivo kidney. BIOMED ENG-BIOMED TE 2024; 69:211-217. [PMID: 37924274 DOI: 10.1515/bmt-2023-0174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 10/11/2023] [Indexed: 11/06/2023]
Abstract
OBJECTIVES To evaluate tissue expansion during cryoablation, the displacement of markers in ex vivo kidney tissue was determined using computed tomographic (CT) imaging. METHODS CT-guided cryoablation was performed in nine porcine kidneys over a 10 min period. Markers and fiber optic temperature probes were positioned perpendicular to the cryoprobe shaft in an axial orientation. The temperature measurement was performed simultaneously with the acquisitions of the CT images in 5 s intervals. The distance change of the markers to the cryoprobe was determined in each CT image and equated to the measured temperature at the marker. RESULTS The greatest increase in the distance between the markers and the cryoprobe was observed in the initial phase of cryoablation. The maximum displacement of the markers was determined to be 0.31±0.2 mm and 2.8±0.02 %, respectively. CONCLUSIONS The mean expansion of ex vivo kidney tissue during cryoablation with a single cryoprobe is 0.31±0.2 mm. The results can be used for identification of basic parameters for optimization of therapy planning.
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Affiliation(s)
- Frank Hübner
- Institute of Diagnostic and Interventional Radiology, University Hospital, Goethe University Frankfurt, Frankfurt, Germany
| | - Moritz Klaus
- Institute of Diagnostic and Interventional Radiology, University Hospital, Goethe University Frankfurt, Frankfurt, Germany
| | - Norbert Siedow
- Fraunhofer Institute for Industrial Mathematics (ITWM), Kaiserslautern, Germany
| | | | - Thomas Josef Vogl
- Institute of Diagnostic and Interventional Radiology, University Hospital, Goethe University Frankfurt, Frankfurt, Germany
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2
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Adamo DA, Greenwood BM, Ghanouni P, Arora S. MR Imaging-Guided Prostate Cancer Therapies. Radiol Clin North Am 2024; 62:121-133. [PMID: 37973238 DOI: 10.1016/j.rcl.2023.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Prostate cancer is the most common malignancy diagnosed in men. MR imaging-guided therapies for prostate cancer have become an increasingly common treatment alternative to traditional whole-gland therapies, such as radical prostatectomy or radiation therapy. This is especially true in men with localized, low- to intermediate-risk prostate cancer. Although long-term oncologic data remain limited, the authors describe several MR imaging-guided therapeutic options for the treatment of prostate cancer, including cryoablation, laser ablation, transrectal high-intensity focused ultrasound, and transurethral ultrasound ablation.
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Affiliation(s)
- Daniel A Adamo
- Mayo Clinic, 200 1st Street Southwest, Rochester, MN 55905, USA
| | | | - Pejman Ghanouni
- Department of Radiology, Stanford University, Lucas Center for Imaging, 1201 Welch Road, Room P267, Stanford, CA 94305, USA
| | - Sandeep Arora
- Yale University School of Medicine, Department of Radiology & Biomedical Imaging, 330 Cedar Street, TE-2, PO Box 208042, New Haven, CT 06520-8042, USA.
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3
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Hickey S, Reichert A, Ptacek W, Bielak L, Reiss S, Fischer J, Gunashekar DD, Bortfeld T, Bock M. Simultaneous T 2 -weighted real-time MRI of two orthogonal slices. Magn Reson Med 2023; 90:2388-2399. [PMID: 37427459 DOI: 10.1002/mrm.29795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 06/22/2023] [Accepted: 06/23/2023] [Indexed: 07/11/2023]
Abstract
PURPOSE MR guidance is used during therapy to detect and compensate for lesion motion. T2 -weighted MRI often has a superior lesion contrast in comparison to T1 -weighted real-time imaging. The purpose of this work was to design a fast T2 -weighted sequence capable of simultaneously acquiring two orthogonal slices, enabling real-time tracking of lesions. METHODS To generate a T2 contrast in two orthogonal slices simultaneously, a sequence (Ortho-SFFP-Echo) was designed that samples the T2 -weighted spin echo (S- ) signal in a TR-interleaved acquisition of two slices. Slice selection and phase-encoding directions are swapped between the slices, leading to a unique set of spin-echo signal conditions. To minimize motion-related signal dephasing, additional flow-compensation strategies are implemented. In both the abdominal breathing phantom and in vivo experiments, a time series was acquired using Ortho-SSFP-Echo. The centroid of the target was tracked in postprocessing steps. RESULTS In the phantom, the lesion could be identified and delineated in the dynamic images. In the volunteer experiments, the kidney was visualized with a T2 contrast at a temporal resolution of 0.45 s under free-breathing conditions. A respiratory belt demonstrated a strong correlation with the time course of the kidney centroid in the head-foot direction. A hypointense saturation band at the slice overlap did not inhibit lesion tracking in the semi-automatic postprocessing steps. CONCLUSION The Ortho-SFFP-Echo sequence delivers real-time images with a T2 -weighted contrast in two orthogonal slices. The sequence allows for simultaneous acquisition, which could be beneficial for real-time motion tracking in radiotherapy or interventional MRI.
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Affiliation(s)
- Samantha Hickey
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Andreas Reichert
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | | | - Lars Bielak
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- German Cancer Consortium (DKTK), Partner Site 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
| | - Johannes Fischer
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Deepa Darshini Gunashekar
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Thomas Bortfeld
- Division of Radiation Biophysics, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - 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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Misuraca L, Lugnani F, Brassetti A, Cacciatore L, Tedesco F, Anceschi U, Bove AM, D'Annunzio S, Ferriero M, Guaglianone S, Mastroianni R, Tuderti G, Panebianco V, Sentinelli S, Simone G. Single-Setting 3D MRI/US-Guided Frozen Sectioning and Cryoablation of the Index Lesion: Mid-Term Oncologic and Functional Outcomes from a Pilot Study. J Pers Med 2023; 13:978. [PMID: 37373967 DOI: 10.3390/jpm13060978] [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: 04/26/2023] [Revised: 06/06/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
Our study explored frozen section reliability in prostate cancer (PCa) diagnoses and described surgical steps of a 3D magnetic resonance imaging (MRI)-ultrasound (US)-guided prostate biopsy (PB) and focal cryoablation of the index lesion (IL) in a single-setting procedure. Patients with a suspicious prostatic specific antigen (PSA) value, with a PIRADS 4 or 5 single lesion, were enrolled for trans perineal 3D MRI-US-guided PB and TRUS-guided focal cryoablation. Three cores were taken from the IL, three cores from the surrounding area, while systematic sampling was performed for the rest of the gland. After confirmation of PCa in frozen sections, focal cryoablation was performed. The 1st-year follow-up schedule included a PSA test at a 3-month interval, MRI 3 months and 1 year postoperatively and PB of the treated area at 1 year. Following the follow-up schedule, an involved PSA test at a 3-month interval and yearly MRI were performed. The PCa diagnosis was histologically confirmed in all three patients with frozen sections. At final histology, a single Gleason score upgrade from 6 (3 + 3) to 7 (3 + 4) was observed. All patients were discharged on postoperative day 1. At the 3-month evaluation, mean PSA values decreased from 12.54 (baseline) to 1.73 ng/mL and MRI images showed complete ablation of the IL in all patients. Urinary continence and potency were preserved in all patients. At the 1-year follow-up, one patient had suspicious ipsilateral recurrence on MRI and underwent a new analogous procedure. Post follow-up was uneventful and PSA remained stable in all patients. Three-dimensional MRI-US-guided frozen sectioning and focal cryoablation of the IL is a step forward towards a "patient-tailored" minimally invasive approach to the diagnosis and cure of PCa.
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Affiliation(s)
- Leonardo Misuraca
- Department of Urology, IRCCS Regina Elena National Cancer Institute, 00128 Rome, Italy
| | - Franco Lugnani
- Department of Urology, Hippocrates D.O.O, 6215 Divaca, Slovenia
| | - Aldo Brassetti
- Department of Urology, IRCCS Regina Elena National Cancer Institute, 00128 Rome, Italy
| | - Loris Cacciatore
- Department of Urology, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy
| | - Francesco Tedesco
- Department of Urology, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy
| | - Umberto Anceschi
- Department of Urology, IRCCS Regina Elena National Cancer Institute, 00128 Rome, Italy
| | - Alfredo Maria Bove
- Department of Urology, IRCCS Regina Elena National Cancer Institute, 00128 Rome, Italy
| | - Simone D'Annunzio
- Department of Urology, IRCCS Regina Elena National Cancer Institute, 00128 Rome, Italy
| | | | - Salvatore Guaglianone
- Department of Urology, IRCCS Regina Elena National Cancer Institute, 00128 Rome, Italy
| | - Riccardo Mastroianni
- Department of Urology, IRCCS Regina Elena National Cancer Institute, 00128 Rome, Italy
| | - Gabriele Tuderti
- Department of Urology, IRCCS Regina Elena National Cancer Institute, 00128 Rome, Italy
| | | | - Steno Sentinelli
- Department of Pathology, IRCCS "Regina Elena" National Cancer Institute, 00128 Rome, Italy
| | - Giuseppe Simone
- Department of Urology, IRCCS Regina Elena National Cancer Institute, 00128 Rome, Italy
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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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6
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Hankiewicz JH, Celinski Z, Camley RE. Measurement of sub-zero temperatures in MRI using T 1 temperature sensitive soft silicone materials: Applications for MRI-guided cryosurgery. Med Phys 2021; 48:6844-6858. [PMID: 34562287 DOI: 10.1002/mp.15252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 09/12/2021] [Accepted: 09/17/2021] [Indexed: 11/07/2022] Open
Abstract
PURPOSE One standard method, proton resonance frequency shift, for measuring temperature using magnetic resonance imaging (MRI), in MRI-guided surgeries, fails completely below the freezing point of water. Because of this, we have developed a new methodology for monitoring temperature with MRI below freezing. The purpose of this paper is to show that a strong temperature dependence of the nuclear relaxation time T1 in soft silicone polymers can lead to temperature-dependent changes of MRI intensity acquired with T1 weighting. We propose the use of silicone filaments inserted in tissue for measuring temperature during MRI-guided cryoablations. METHODS The temperature dependence of T1 in bio-compatible soft silicone polymers was measured using nuclear magnetic resonance spectroscopy and MRI. Phantoms, made of bulk silicone materials and put in an MRI-compatible thermal container with dry ice, allowed temperature measurements ranging from -60°C to + 20°C. T1 -weighted gradient echo images of the phantoms were acquired at spatially uniform temperatures and with a gradient in temperature to determine the efficacy of using these materials as temperature indicators in MRI. Ex vivo experiments on silicone rods, 4 mm in diameter, inserted in animal tissue were conducted to assess the practical feasibility of the method. RESULTS Measurements of nuclear relaxation times of protons in soft silicone polymers show a monotonic, nearly linear, change with temperature (R2 > 0.98) and have a significant correlation with temperature (Pearson's r > 0.99, p < 0.01). Similarly, the intensity of the MR images in these materials, taken with a gradient echo sequence, are also temperature dependent. There is again a monotonic change in MRI intensity that correlates well with the measured temperature (Pearson's r < -0.98 and p < 0.01). The MRI experiments show that a temperature change of 3°C can be resolved in a distance of about 2.5 mm. Based on MRI images and external sensor calibrations for a sample with a gradient in temperature, temperature maps with 3°C isotherms are created for a bulk phantom. Experiments demonstrate that these changes in MRI intensity with temperature can also be seen in 4 mm silicone rods embedded in ex vivo animal tissue. CONCLUSIONS We have developed a new method for measuring temperature in MRI that potentially could be used during MRI-guided cryoablation operations, reducing both procedure time and cost, and making these surgeries safer.
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Affiliation(s)
- Janusz H Hankiewicz
- UCCS BioFrontiers Center, University of Colorado at Colorado Springs, USA.,MRX Analytics, PBC, Colorado Springs, Colorado, USA
| | - Zbigniew Celinski
- UCCS BioFrontiers Center, University of Colorado at Colorado Springs, USA.,MRX Analytics, PBC, Colorado Springs, Colorado, USA
| | - Robert E Camley
- UCCS BioFrontiers Center, University of Colorado at Colorado Springs, USA.,MRX Analytics, PBC, Colorado Springs, Colorado, USA
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7
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Lu A, Favazza CP, Felmlee JP, Welch BT, Mynderse LA, Browne JE, Woodrum DA, Gorny KR. Experimental Investigation of Cryoneedle Heating during MR-Guided Cryoablation in Ex Vivo Tissue Samples at 1.5-Tesla. J Vasc Interv Radiol 2021; 32:721-728.e2. [PMID: 33663924 DOI: 10.1016/j.jvir.2021.01.272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 01/07/2021] [Accepted: 01/22/2021] [Indexed: 11/15/2022] Open
Abstract
PURPOSE To investigate cryoneedle heating risks during magnetic resonance (MR)-guided cryoablation and potential strategies to mitigate these risks. MATERIALS AND METHODS Ex vivo experiments were performed on a 1.5-Tesla (T) MR scanner using an MR conditional cryoablation system on porcine tissue phantoms. Cryoneedles were placed inside the tissue phantom either with or without an angiocatheter. Typical cryoneedle geometric configurations (including gas supply line) encountered in clinical procedures with low to high expected heating risks were investigated. Up to 4 fiber optic temperature sensors were attached to the cryoneedle/angiocatheter to measure the MR-induced cryoneedle heating at different locations during MR with different estimated specific absorption rates (SARs). The impact of cryoneedle heating on cryoablation treatment was studied by comparing temperature changes during 10-min freeze-thaw cycles with and without MR. RESULTS Rapid temperature increases of >100 °C in < 2 minutes were observed during MR with a SAR of 2.1 W/kg. The temperature changes during a typical freeze-thaw cycle were also affected by cryoneedle heating when MR was used to monitor the ice-ball evolution. The observed cryoneedle heating was affected by multiple factors; including cryoneedle geometric configurations, sequence SAR, whether an angiocatheter was used, and whether the cryoneedle was connected to the rest of the cryoablation system. CONCLUSIONS The ex vivo experiments demonstrated that MR could induce significant cryoneedle heating risks. Furthermore, MR-induced cryoneedle heating can affect temperatures in the ice-ball evolution during the freeze-thaw cycle. Several practical strategies to reduce the cryoneedle heating have been proposed.
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Affiliation(s)
- Aiming Lu
- Department of Radiology, Mayo Clinic, Rochester, Minnesota.
| | | | - Joel P Felmlee
- Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - Brian T Welch
- Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - Lance A Mynderse
- Department of Radiology, Mayo Clinic, Rochester, Minnesota; Department of Urology, Mayo Clinic, Rochester, Minnesota
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Schaefer PM, Guenette JP, Lee TC. Intraprocedural MRI monitoring during percutaneous cryoablation procedures of the head and neck, and spine: a single institution experience. Clin Imaging 2020; 73:6-12. [PMID: 33246275 DOI: 10.1016/j.clinimag.2020.11.028] [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: 08/05/2020] [Revised: 11/10/2020] [Accepted: 11/11/2020] [Indexed: 10/23/2022]
Abstract
RATIONALE AND OBJECTIVES Evaluate whether intraprocedural MRI monitoring of percutaneous cryoablation procedures of head and neck, and spine lesions is effective for avoiding iatrogenic neurovascular and mucosal injury. MATERIALS AND METHODS We retrospectively reviewed 64 consecutive percutaneous head and neck, and spine cryoablation procedures with intraprocedural MRI monitoring performed on 45 patients (mean age 55 years, range 17-91 years). Ablation goals were either complete local control of primary or metastatic lesions or pain relief. RESULTS The technical success rate was 100%. The complication rate was 13% with only 2 complications (3%) requiring further intervention. There were no deaths or persistent neurological or vascular complications. Subsequent cryoablation in the same location was performed in 12 patients (27%). Subsequent surgical intervention in the same location was performed in 7 patients (16%) for progressive disease or worsening symptoms. CONCLUSIONS MRI provides excellent visualization of the ice ball margin during percutaneous cryoablation procedures. Accurate intraprocedural visualization of the ice ball allows for adjustment of cryoablation parameters to avoid damage to adjacent vital neurovascular structures or mucosal surfaces. Intraprocedural MRI monitoring is thus a novel and highly effective method that allows a high rate of technical success for cryoablation in the head and neck, and spine while avoiding iatrogenic injury.
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Affiliation(s)
- Peter M Schaefer
- Department of Radiology, Brigham and Women's Hospital, Boston, MA, United States of America.
| | - Jeffrey P Guenette
- Department of Radiology, Brigham and Women's Hospital, Boston, MA, United States of America.
| | - Thomas C Lee
- Department of Radiology, Brigham and Women's Hospital, Boston, MA, United States of America.
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9
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Hübner F, Schreiner R, Panahi B, Vogl TJ. Evaluation of the thermal sensitivity of porcine liver in CT-guided cryoablation: an initial study. Med Phys 2020; 47:4997-5005. [PMID: 32748398 DOI: 10.1002/mp.14432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/19/2020] [Accepted: 07/24/2020] [Indexed: 11/12/2022] Open
Abstract
PURPOSE To evaluate computed tomography (CT)-based thermometry in cryoablation, the thermal sensitivity of an ex-vivo porcine liver was determined in an initial study design. METHODS The CT-guided cryoablation was performed in three porcine liver samples over a period of 10 min. Fiber optic temperature probes were positioned parallel to the shaft of the cryoprobe in an axial slice orientation. During ablation, temperature measurements were performed simultaneously with CT imaging at 5 s intervals. On the CT images, the average CT number was calculated for a region of interest of 3 × 3 pixels just below the tip of each temperature probe. A linear regression analysis was performed using eleven data sets to determine the dependence of the CT number on the temperature. RESULTS With decreasing temperature, an increasing hypodense area around the tip of the cryoprobe was observed on the CT images and decreasing values of the CT number were determined. Starting at a temperature of - 40°C a linear relation between the CT number and the temperature was determined and a thermal sensitivity of 0.95 HU/°C (R2 = 0.73) was obtained. The thermal sensitivity was used to calculate color-coded temperature maps. The calculated temperature distribution corresponds quantitatively to the increasing hypodense area. CONCLUSIONS A noninvasive CT-based temperature determination during cryoablation in a normal ex vivo porcine liver is feasible. A thermal sensitivity of 0.95 HU/°C was determined by linear regression analysis. A color-coded map of the temperature distribution was presented.
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Affiliation(s)
- Frank Hübner
- Institute of Diagnostic and Interventional Radiology, University Hospital, Theodor-Stern-Kai 7, Frankfurt, 60590, Germany
| | - Roland Schreiner
- Institute of Diagnostic and Interventional Radiology, University Hospital, Theodor-Stern-Kai 7, Frankfurt, 60590, Germany
| | - Bita Panahi
- Institute of Diagnostic and Interventional Radiology, University Hospital, Theodor-Stern-Kai 7, Frankfurt, 60590, Germany
| | - Thomas Josef Vogl
- Institute of Diagnostic and Interventional Radiology, University Hospital, Theodor-Stern-Kai 7, Frankfurt, 60590, Germany
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10
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Shono N, Ninni B, King F, Kato T, Tokuda J, Fujimoto T. Simulated accuracy assessment of small footprint body-mounted probe alignment device for MRI-guided cryotherapy of abdominal lesions. Med Phys 2020; 47:2337-2349. [PMID: 32141080 PMCID: PMC7889307 DOI: 10.1002/mp.14116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 02/19/2020] [Accepted: 02/19/2020] [Indexed: 12/11/2022] Open
Abstract
PURPOSE Magnetic resonance imaging (MRI)-guided percutaneous cryotherapy of abdominal lesions, an established procedure, uses MRI to guide and monitor the cryoablation of lesions. Methods to precisely guide cryotherapy probes with a minimum amount of trial-and-error are yet to be established. To aid physicians in attaining precise probe alignment without trial-and-error, a body-mounted motorized cryotherapy-probe alignment device (BMCPAD) with motion compensation was clinically tested in this study. The study also compared the contribution of body motion and organ motion compensation to the guidance accuracy of a body-mounted probe alignment device. METHODS The accuracy of guidance using the BMCPAD was prospectively measured during MRI-guided percutaneous cryotherapies before insertion of the probes. Clinical parameters including patient age, types of anesthesia, depths of the target, and organ sites of target were collected. By using MR images of the target organs and fiducial markers embedded in the BMCPAD, we retrospectively simulated the guidance accuracy with body motion compensation, organ motion compensation, and no compensation. The collected data were analyzed to test the impact of motion compensation on the guidance accuracy. RESULTS Thirty-seven physical guidance of probes were prospectively recorded for sixteen completed cases. The accuracy of physical guidance using the BMCPAD was 13.4 ± 11.1 mm. The simulated accuracy of guidance with body motion compensation, organ motion compensation, and no compensation was 2.4 ± 2.9 mm, 2.2 ± 1.6 mm, and 3.5 ± 2.9 mm, respectively. Data analysis revealed that the body motion compensation and organ motion compensation individually impacted the improvement in the accuracy of simulated guidance. Moreover, the difference in the accuracy of guidance either by body motion compensation or organ motion compensation was not statistically significant. The major clinical parameters impacting the accuracy of guidance were the body and organ motions. Patient age, types of anesthesia, depths of the target, and organ sites of target did not influence the accuracy of guidance using BMCPAD. The magnitude of body surface movement and organ movement exhibited mutual statistical correlation. CONCLUSIONS The BMCPAD demonstrated guidance accuracy comparable to that of previously reported devices for CT-guided procedures. The analysis using simulated motion compensation revealed that body motion compensation and organ motion compensation individually impact the improvement in the accuracy of device-guided cryotherapy probe alignment. Considering the correlation between body and organ movements, we also determined that body motion compensation using the ring fiducial markers in the BMCPAD can be solely used to address both body and organ motions in MRI-guided cryotherapy.
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Affiliation(s)
- Naoyuki Shono
- Radiology, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Brian Ninni
- Radiology, Brigham and Women’s Hospital, Boston, MA 02115, USA
- Canon Healthcare Optics Research Laboratory Boston, Cambridge, MA 02139, USA
| | - Franklin King
- Radiology, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Takahisa Kato
- Radiology, Brigham and Women’s Hospital, Boston, MA 02115, USA
- Canon Healthcare Optics Research Laboratory Boston, Cambridge, MA 02139, USA
| | - Junichi Tokuda
- Radiology, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Takahiro Fujimoto
- Division of Clinical Radiology Service, Kyoto University Hospital, Kyoto, Kyoto 606-8507, Japan
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Dunne M, Regenold M, Allen C. Hyperthermia can alter tumor physiology and improve chemo- and radio-therapy efficacy. Adv Drug Deliv Rev 2020; 163-164:98-124. [PMID: 32681862 DOI: 10.1016/j.addr.2020.07.007] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/07/2020] [Accepted: 07/10/2020] [Indexed: 12/20/2022]
Abstract
Hyperthermia has demonstrated clinical success in improving the efficacy of both chemo- and radio-therapy in solid tumors. Pre-clinical and clinical research studies have demonstrated that targeted hyperthermia can increase tumor blood flow and increase the perfused fraction of the tumor in a temperature and time dependent manner. Changes in tumor blood circulation can produce significant physiological changes including enhanced vascular permeability, increased oxygenation, decreased interstitial fluid pressure, and reestablishment of normal physiological pH conditions. These alterations in tumor physiology can positively impact both small molecule and nanomedicine chemotherapy accumulation and distribution within the tumor, as well as the fraction of the tumor susceptible to radiation therapy. Hyperthermia can trigger drug release from thermosensitive formulations and further improve the accumulation, distribution, and efficacy of chemotherapy.
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12
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Yamada A, Tokuda J, Naka S, Murakami K, Tani T, Morikawa S. Magnetic resonance and ultrasound image-guided navigation system using a needle manipulator. Med Phys 2019; 47:850-858. [PMID: 31829440 DOI: 10.1002/mp.13958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 12/06/2019] [Accepted: 12/06/2019] [Indexed: 12/23/2022] Open
Abstract
PURPOSE Image guidance is crucial for percutaneous tumor ablations, enabling accurate needle-like applicator placement into target tumors while avoiding tissues that are sensitive to injury and/or correcting needle deflection. Although ultrasound (US) is widely used for image guidance, magnetic resonance (MR) is preferable due to its superior soft tissue contrast. The objective of this study was to develop and evaluate an MR and US multi-modal image-guided navigation system with a needle manipulator to enable US-guided applicator placement during MR imaging (MRI)-guided percutaneous tumor ablation. METHODS The MRI-compatible needle manipulator with US probe was installed adjacent to a 3 Tesla MRI scanner patient table. Coordinate systems for the MR image, patient table, manipulator, and US probe were all registered using an optical tracking sensor. The patient was initially scanned in the MRI scanner bore for planning and then moved outside the bore for treatment. Needle insertion was guided by real-time US imaging fused with the reformatted static MR image to enhance soft tissue contrast. Feasibility, targeting accuracy, and MR compatibility of the system were evaluated using a bovine liver and agar phantoms. RESULTS Targeting error for 50 needle insertions was 1.6 ± 0.6 mm (mean ± standard deviation). The experiment confirmed that fused MR and US images provided real-time needle localization against static MR images with soft tissue contrast. CONCLUSIONS The proposed MR and US multi-modal image-guided navigation system using a needle manipulator enabled accurate needle insertion by taking advantage of static MR and real-time US images simultaneously. Real-time visualization helped determine needle depth, tissue monitoring surrounding the needle path, target organ shifts, and needle deviation from the path.
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Affiliation(s)
- Atsushi Yamada
- Department of Research and Development for Innovative Medical Devices and Systems, Shiga University of Medical Science, Otsu, Shiga, 520-2192, Japan
| | - Junichi Tokuda
- National Center for Image Guided Therapy, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, 02115, USA
| | - Shigeyuki Naka
- Department of Surgery, Shiga University of Medical Science, Otsu, Shiga, 520-2192, Japan
| | - Koichiro Murakami
- Department of Surgery, Shiga University of Medical Science, Otsu, Shiga, 520-2192, Japan
| | - Tohru Tani
- Department of Research and Development for Innovative Medical Devices and Systems, Shiga University of Medical Science, Otsu, Shiga, 520-2192, Japan
| | - Shigehiro Morikawa
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Otsu, Shiga, 520-2192, Japan
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Abstract
OBJECTIVE Imaging plays a key role in the assessment of patients before, during, and after percutaneous cryoablation of hepatic tumors. Intra-procedural and early post-procedure imaging with CT and MRI is vital to the assessment of technical success including adequacy of ablation zone coverage. Recognition of the normal expected post-procedure findings of hepatic cryoablation such as ice ball formation, hydrodissection, and the normal appearance of the ablation zone is crucial to be able to differentiate from complications including vascular, biliary, or non-target organ injury. Delayed imaging is essential for determination of clinical effectiveness and detection of unexpected findings such as residual unablated tumor and local tumor progression. The purpose of this article is to review the spectrum of expected and unexpected imaging findings that may occur during or after percutaneous cryoablation of hepatic tumors. CONCLUSION Differentiating expected from unexpected findings during and after hepatic cryoablation helps radiologists identify residual or recurrent tumor and detect procedure-related complications.
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de Marini P, Cazzato RL, Garnon J, Shaygi B, Koch G, Auloge P, Tricard T, Lang H, Gangi A. Percutaneous MR-guided prostate cancer cryoablation technical updates and literature review. BJR Open 2019; 1:20180043. [PMID: 33178928 PMCID: PMC7592492 DOI: 10.1259/bjro.20180043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 03/25/2019] [Accepted: 05/16/2019] [Indexed: 11/05/2022] Open
Abstract
Prostate cancer (PCa) is the most common malignant tumor in males. The benefits in terms of overall reduction in specific mortality due to the widespread use of Prostate Specific Antigen (PSA) screening and the advancements in the curative treatments (radical prostatectomy or radiotherapy) appear to have reached a plateau. There remains, however, the questions of overdiagnosis and overtreatment of such patients. Currently, the main challenge in the treatment of patients with clinically organ-confined PCa is to offer an oncologically efficient treatment with as little morbidity as possible. Amongst the arising novel curative techniques for PCa, cryoablation (CA) is the most established one, which is also included in the NICE and AUA guidelines. CA is commonly performed under ultrasound guidance with the inherent limitations associated with this technique. The recent advancements in MRI have significantly improved the accuracy of detecting and characterizing a clinically significant PCa. This, alongside the development of wide bore interventional MR scanners, has opened the pathway for in bore PCa treatment. Under MRI guidance, PCa CA can be used either as a standard whole gland treatment or as a tumor targeted one. With MR-fluoroscopy, needle guidance capability, multiplanar and real-time visualization of the iceball, MRI eliminates the inherent limitations of ultrasound guidance and can potentially lead to a lower rate of local complications. The aim of this review article is to provide an overview about PCa CA with a more specific insight on MR guided PCa CA; the limitations, challenges and applications of this novel technique will be discussed.
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Affiliation(s)
- Pierre de Marini
- Department of Interventional Radiology, University Hospital of Strasbourg, 1 Place de l'Hôpital, Strasbourg Cedex, France
| | - Roberto Luigi Cazzato
- Department of Interventional Radiology, University Hospital of Strasbourg, 1 Place de l'Hôpital, Strasbourg Cedex, France
| | - Julien Garnon
- Department of Interventional Radiology, University Hospital of Strasbourg, 1 Place de l'Hôpital, Strasbourg Cedex, France
| | - Behnam Shaygi
- Department of Radiology, King's College Hospital, Denmark Hill, London, UK
| | - Guillaume Koch
- Department of Interventional Radiology, University Hospital of Strasbourg, 1 Place de l'Hôpital, Strasbourg Cedex, France
| | - Pierre Auloge
- Department of Interventional Radiology, University Hospital of Strasbourg, 1 Place de l'Hôpital, Strasbourg Cedex, France
| | - Thibault Tricard
- Department of Urology, University Hospital of Strasbourg, 1 Place de l'Hôpital, Strasbourg Cedex, France
| | - Hervé Lang
- Department of Urology, University Hospital of Strasbourg, 1 Place de l'Hôpital, Strasbourg Cedex, France
| | - Afshin Gangi
- Department of Interventional Radiology, University Hospital of Strasbourg, 1 Place de l'Hôpital, Strasbourg Cedex, France
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Zhao Z, Jordan S, Tse ZTH. Devices for image-guided lung interventions: State-of-the-art review. Proc Inst Mech Eng H 2019; 233:444-463. [DOI: 10.1177/0954411919832042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lung cancer is the leading cause of cancer-related death. According to the American Cancer Society, there were an estimated 222,500 new cases of lung cancer and 155,870 deaths from lung cancer in the United States in 2017. Accurate localization in lung interventions is one of the keys to reducing the death rate from lung cancer. In this study, a total of 217 publications from 2006 to 2017 about designs of medical devices for localization in lung interventions were screened, shortlisted, and categorized by localization principle and reviewed for functionality. Each study was analyzed for engineering characteristics and clinical significance. Research regarding interventional imaging equipment, navigation systems, and surgical devices was reviewed, and both research prototypes and commercial products were discussed. Finally, the future directions and existing challenges were summarized, including real-time intra-procedure guidance, accuracy of localization, clinical application, clinical adoptability, and clinical regulatory issues.
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Affiliation(s)
- Zhuo Zhao
- School of Electrical and Computer Engineering, College of Engineering, University of Georgia, Athens, GA, USA
| | - Sophie Jordan
- School of Electrical and Computer Engineering, College of Engineering, University of Georgia, Athens, GA, USA
| | - Zion Tsz Ho Tse
- School of Electrical and Computer Engineering, College of Engineering, University of Georgia, Athens, GA, USA
- 3T Technologies LLC, Atlanta, GA, USA
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Cornud F, Bomers J, Futterer J, Ghai S, Reijnen J, Tempany C. MR imaging-guided prostate interventional imaging: Ready for a clinical use? Diagn Interv Imaging 2018; 99:743-753. [DOI: 10.1016/j.diii.2018.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 08/08/2018] [Indexed: 01/22/2023]
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Tokuda J, Chauvin L, Ninni B, Kato T, King F, Tuncali K, Hata N. Motion compensation for MRI-compatible patient-mounted needle guide device: estimation of targeting accuracy in MRI-guided kidney cryoablations. Phys Med Biol 2018; 63:085010. [PMID: 29546845 DOI: 10.1088/1361-6560/aab736] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Patient-mounted needle guide devices for percutaneous ablation are vulnerable to patient motion. The objective of this study is to develop and evaluate a software system for an MRI-compatible patient-mounted needle guide device that can adaptively compensate for displacement of the device due to patient motion using a novel image-based automatic device-to-image registration technique. We have developed a software system for an MRI-compatible patient-mounted needle guide device for percutaneous ablation. It features fully-automated image-based device-to-image registration to track the device position, and a device controller to adjust the needle trajectory to compensate for the displacement of the device. We performed: (a) a phantom study using a clinical MR scanner to evaluate registration performance; (b) simulations using intraoperative time-series MR data acquired in 20 clinical cases of MRI-guided renal cryoablations to assess its impact on motion compensation; and (c) a pilot clinical study in three patients to test its feasibility during the clinical procedure. FRE, TRE, and success rate of device-to-image registration were 2.71 ± 2.29 mm, 1.74 ± 1.13 mm, and 98.3% for the phantom images. The simulation study showed that the motion compensation reduced the targeting error for needle placement from 8.2 mm to 5.4 mm (p < 0.0005) in patients under general anesthesia (GA), and from 14.4 mm to 10.0 mm (p < 1.0 × 10(−5)) in patients under monitored anesthesia care (MAC). The pilot study showed that the software registered the device successfully in a clinical setting. Our simulation study demonstrated that the software system could significantly improve targeting accuracy in patients treated under both MAC and GA. Intraprocedural image-based device-to-image registration was feasible.
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Affiliation(s)
- Junichi Tokuda
- Department of Radiology, Brigham and Womens Hospital and Harvard Medical School, Boston, MA 02115, United States of America
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Laredo JD, Chiras J, Kemel S, Taihi L, Hamze B. Vertebroplasty and interventional radiology procedures for bone metastases. Joint Bone Spine 2018; 85:191-199. [DOI: 10.1016/j.jbspin.2017.05.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/21/2017] [Indexed: 10/19/2022]
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Abstract
Understanding and management of vascular anomalies has always been intriguing. These disorders exhibit an expected pattern of clinical presentation and progression, and characteristic imaging findings. Significant progress in understanding and treating patients with vascular anomalies has been made in the past quarter century. Newer multidisciplinary domains for treating these disorders with medical drugs and less invasive image-guided or surgical procedures are constantly evolving. Vascular anomalies can exhibit aggressive tumor-like behavior resulting in recurrence or persistent symptoms after treatment. Thermal ablation has been widely used in tumor treatment. This has generated interest on using thermal ablation for treating vascular anomalies. Percutaneous image-guided cryoablation is increasingly used for this purpose as compared with other ablation technologies. Availability of small caliber cryoprobes and the ability to monitor the freeze zone in real time have made this an attractive option to interventional radiologists. These experiences are relatively new and limited. It is helpful to understand the emerging role of this technology in the treatment of vascular anomalies.
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Affiliation(s)
- Raja Shaikh
- Department of Radiology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts
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van Oostenbrugge TJ, Langenhuijsen JF, Overduin CG, Jenniskens SF, Mulders PF, Fütterer JJ. Percutaneous MR Imaging–Guided Cryoablation of Small Renal Masses in a 3-T Closed-Bore MR Imaging Environment: Initial Experience. J Vasc Interv Radiol 2017; 28:1098-1107.e1. [DOI: 10.1016/j.jvir.2017.05.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 05/06/2017] [Accepted: 05/11/2017] [Indexed: 10/19/2022] Open
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Percutaneous MR-guided focal cryoablation for recurrent prostate cancer following radiation therapy: retrospective analysis of iceball margins and outcomes. Eur Radiol 2017; 27:4828-4836. [PMID: 28409355 PMCID: PMC5635095 DOI: 10.1007/s00330-017-4833-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 03/02/2017] [Accepted: 03/21/2017] [Indexed: 10/29/2022]
Abstract
OBJECTIVES To evaluate iceball margins after magnetic resonance (MR)-guided focal salvage prostate cryoablation and determine the correlation with local outcome. METHODS A retrospective review was performed on 47 patients that underwent percutaneous MR-guided focal cryoablation for biopsy-proven locally recurrent prostate cancer after primary radiotherapy. Preprocedural diagnostic and intraprocedural MR images were analysed to derive three-directional iceball margins. Local tumour progression after cryoablation was defined as evident tumour recurrence on follow-up MRI, positive MR-guided biopsy or biochemical failure without radiological evidence of metastatic disease. RESULTS Mean iceball margins were 8.9 mm (range -7.1 to 16.2), 10.1 mm (range 1.1-20.3) and 12.5 mm (range -1.5 to 22.2) in anteroposterior, left-right and craniocaudal direction respectively. Iceball margins were significantly smaller for tumours that were larger (P = .008) or located in the posterior gland (P = .047). Significantly improved local progression-free survival at 1 year post focal cryoablation was seen between patients with iceball margin >10 mm (100%), 5-10 mm (84%) and <5 mm (15%) (P < .001). CONCLUSIONS Iceball margins appear to correlate with local outcome following MR-guided focal salvage prostate cryoablation. Our initial data suggest that freezing should be applied at minimum 5 mm beyond the border of an MR-visible recurrent prostate tumour for successful ablation, with a wider margin appearing desirable. KEY POINTS • Shortest iceball margin most often occurred in anteroposterior direction • Margins were smaller in tumours that were larger or posteriorly located • Minimum iceball margin was a predictor of early local tumour progression • A minimum 5-mm margin seems required for effective cryoablation of recurrent PCa.
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Overduin CG, Fütterer JJ, Scheenen TW. 3D MR thermometry of frozen tissue: Feasibility and accuracy during cryoablation at 3T. J Magn Reson Imaging 2016; 44:1572-1579. [DOI: 10.1002/jmri.25301] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 04/21/2016] [Accepted: 04/21/2016] [Indexed: 11/06/2022] Open
Affiliation(s)
- Christiaan G. Overduin
- Department of Radiology and Nuclear Medicine; Radboud University Medical Center; Nijmegen the Netherlands
| | - Jurgen J. Fütterer
- Department of Radiology and Nuclear Medicine; Radboud University Medical Center; Nijmegen the Netherlands
- MIRA Institute for Biomedical Engineering and Technical Medicine; University of Twente; Enschede the Netherlands
| | - Tom W.J. Scheenen
- Department of Radiology and Nuclear Medicine; Radboud University Medical Center; Nijmegen the Netherlands
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Preiswerk F, Toews M, Hoge WS, Chiou JYG, Panych LP, Wells WM, Madore B. Hybrid Utrasound and MRI Acquisitions for High-Speed Imaging of Respiratory Organ Motion. ACTA ACUST UNITED AC 2015; 9349:315-322. [PMID: 27135063 DOI: 10.1007/978-3-319-24553-9_39] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Magnetic Resonance (MR) imaging provides excellent image quality at a high cost and low frame rate. Ultrasound (US) provides poor image quality at a low cost and high frame rate. We propose an instance-based learning system to obtain the best of both worlds: high quality MR images at high frame rates from a low cost single-element US sensor. Concurrent US and MRI pairs are acquired during a relatively brief offine learning phase involving the US transducer and MR scanner. High frame rate, high quality MR imaging of respiratory organ motion is then predicted from US measurements, even after stopping MRI acquisition, using a probabilistic kernel regression framework. Experimental results show predicted MR images to be highly representative of actual MR images.
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Affiliation(s)
| | - Matthew Toews
- Brigham and Women's Hospital, Harvard Medical School
| | - W Scott Hoge
- Brigham and Women's Hospital, Harvard Medical School
| | | | | | | | - Bruno Madore
- Brigham and Women's Hospital, Harvard Medical School
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Levesque VM, Shyn PB, Tuncali K, Tatli S, Nawfel RD, Olubiyi O, Silverman SG. Radiation dose during CT-guided percutaneous cryoablation of renal tumors: Effect of a dose reduction protocol. Eur J Radiol 2015. [DOI: 10.1016/j.ejrad.2015.07.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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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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Radiation exposure from CT-guided ablation of renal masses: effects on life expectancy. AJR Am J Roentgenol 2015; 204:335-42. [PMID: 25615756 DOI: 10.2214/ajr.14.13010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE. The purpose of this article is to project the effects of radiation exposure on life expectancy (LE) in patients who opt for CT-guided radiofrequency ablation (RFA) instead of surgery for renal cell carcinoma (RCC). MATERIALS AND METHODS. We developed a decision-analytic Markov model to compare LE losses attributable to radiation exposure in hypothetical 65-year-old patients who undergo CT-guided RFA versus surgery for small (≤ 4 cm) RCC. We incorporated mortality risks from RCC, radiation-induced cancers (for procedural and follow-up CT scans), and all other causes; institutional data informed the RFA procedural effective dose. Radiation-induced cancer risks were generated using an organ-specific approach. Effects of varying model parameters and of dose-reduction strategies were evaluated in sensitivity analysis. RESULTS. Cumulative RFA exposures (up to 305.2 mSv for one session plus surveillance) exceeded those from surgery (up to 87.2 mSv). In 65-year-old men, excess LE loss from radiation-induced cancers, comparing RFA to surgery, was 11.7 days (14.6 days for RFA vs 2.9 days for surgery). Results varied with sex and age; this difference increased to 14.6 days in 65-year-old women and to 21.5 days in 55-year-old men. Dose-reduction strategies that addressed follow-up rather than procedural exposure had a greater impact. In 65-year-old men, this difference decreased to 3.8 days if post-RFA follow-up scans were restricted to a single phase; even elimination of RFA procedural exposure could not achieve equivalent benefits. CONCLUSION. CT-guided RFA remains a safe alternative to surgery, but with decreasing age, the higher burden of radiation exposure merits explicit consideration. Dose-reduction strategies that target follow-up rather than procedural exposure will have a greater impact.
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Graphics Processing Unit-Accelerated Nonrigid Registration of MR Images to CT Images During CT-Guided Percutaneous Liver Tumor Ablations. Acad Radiol 2015; 22:722-33. [PMID: 25784325 DOI: 10.1016/j.acra.2015.01.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 01/18/2015] [Accepted: 01/20/2015] [Indexed: 11/23/2022]
Abstract
RATIONALE AND OBJECTIVES Accuracy and speed are essential for the intraprocedural nonrigid magnetic resonance (MR) to computed tomography (CT) image registration in the assessment of tumor margins during CT-guided liver tumor ablations. Although both accuracy and speed can be improved by limiting the registration to a region of interest (ROI), manual contouring of the ROI prolongs the registration process substantially. To achieve accurate and fast registration without the use of an ROI, we combined a nonrigid registration technique on the basis of volume subdivision with hardware acceleration using a graphics processing unit (GPU). We compared the registration accuracy and processing time of GPU-accelerated volume subdivision-based nonrigid registration technique to the conventional nonrigid B-spline registration technique. MATERIALS AND METHODS Fourteen image data sets of preprocedural MR and intraprocedural CT images for percutaneous CT-guided liver tumor ablations were obtained. Each set of images was registered using the GPU-accelerated volume subdivision technique and the B-spline technique. Manual contouring of ROI was used only for the B-spline technique. Registration accuracies (Dice similarity coefficient [DSC] and 95% Hausdorff distance [HD]) and total processing time including contouring of ROIs and computation were compared using a paired Student t test. RESULTS Accuracies of the GPU-accelerated registrations and B-spline registrations, respectively, were 88.3 ± 3.7% versus 89.3 ± 4.9% (P = .41) for DSC and 13.1 ± 5.2 versus 11.4 ± 6.3 mm (P = .15) for HD. Total processing time of the GPU-accelerated registration and B-spline registration techniques was 88 ± 14 versus 557 ± 116 seconds (P < .000000002), respectively; there was no significant difference in computation time despite the difference in the complexity of the algorithms (P = .71). CONCLUSIONS The GPU-accelerated volume subdivision technique was as accurate as the B-spline technique and required significantly less processing time. The GPU-accelerated volume subdivision technique may enable the implementation of nonrigid registration into routine clinical practice.
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Radiologie interventionnelle des métastases osseuses. ONCOLOGIE 2015. [DOI: 10.1007/s10269-015-2493-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Overduin CG, Bomers JGR, Jenniskens SFM, Hoes MF, ten Haken B, de Lange F, Fütterer JJ, Scheenen TWJ. T1-weighted MR image contrast around a cryoablation iceball: A phantom study and initial comparison within vivofindings. Med Phys 2014; 41:112301. [DOI: 10.1118/1.4896824] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Abstract
Radiofrequency ablation (RFA) has gained a wide acceptance as a first-line therapeutic option for small hepatocellular carcinoma (HCC). For very early-stage HCC, despite a higher rate of local tumour progression, RFA is considered as a viable alternative to surgical resection owing to its comparable long-term survival, reduced morbidity, and greater preservation of hepatic parenchyma. For HCCs larger than 2 cm, RFA can contribute to near-curative therapy when combined with chemoembolization. RFA can be used as part of a multimodal treatment strategy for more advanced or recurrent cases, and could be a useful bridging therapy for patients who are waiting for liver transplantation. However, the use of RFA is still limited in treating large tumours and some tumours in high-risk locations. To overcome its current limitations, other ablation techniques are being developed and it is important to validate the role of other techniques for enhancing performance of ablation therapy for HCC.
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MR Imaging–Guided Percutaneous Cryotherapy for Lung Tumors: Initial Experience. J Vasc Interv Radiol 2014; 25:1456-62. [DOI: 10.1016/j.jvir.2014.04.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2014] [Revised: 04/28/2014] [Accepted: 04/28/2014] [Indexed: 11/24/2022] Open
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Fairchild AH, Tatli S, Dunne RM, Shyn PB, Tuncali K, Silverman SG. Percutaneous cryoablation of hepatic tumors adjacent to the gallbladder: assessment of safety and effectiveness. J Vasc Interv Radiol 2014; 25:1449-55. [PMID: 24906627 DOI: 10.1016/j.jvir.2014.04.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 03/25/2014] [Accepted: 04/27/2014] [Indexed: 12/12/2022] Open
Abstract
PURPOSE To assess safety and effectiveness of percutaneous image-guided cryoablation of hepatic tumors adjacent to the gallbladder. MATERIALS AND METHODS Twenty-one cryoablation procedures were performed to treat 19 hepatic tumors (mean size, 2.7 cm; range, 1.0-5.0 cm) adjacent to the gallbladder in 17 patients (11 male; mean age, 59.2 y; range, 40-82 y) under computed tomography (n = 15) or magnetic resonance imaging (n = 6) guidance in a retrospective study. All tumors (mean size, 2.67 cm; range, 1.0-5.0 cm) were within 1 cm (mean, 0.4 cm) of the gallbladder; seven (33%) were contiguous with the gallbladder. Primary outcomes included complication rate and severity and postprocedure gallbladder imaging findings. Secondary outcomes included technical success and technique effectiveness at 6 months. RESULTS Complications occurred in six of 21 procedures (29%); one (5%) was severe. Ice balls extended into the gallbladder lumen in 20 of 21 procedures (95%); no gallbladder-related complications occurred. The most common gallbladder imaging finding was mild, asymptomatic focal wall thickening after nine of 21 procedures (42%), which resolved on follow-up. Technical success was achieved in 19 of 21 sessions (90%). Six-month follow-up was available for 16 tumors; of these, all but two (87%) had no imaging evidence of local tumor progression. CONCLUSIONS Percutaneous cryoablation of hepatic tumors adjacent to the gallbladder can be performed safely and successfully. Although postprocedural gallbladder changes are common, they are self-limited and clinically inconsequential, even when the ice ball extends into the gallbladder lumen.
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Affiliation(s)
- Alexandra H Fairchild
- Division of Abdominal Imaging and Intervention, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St., Boston, MA 02115.
| | - Servet Tatli
- Division of Abdominal Imaging and Intervention, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St., Boston, MA 02115
| | - Ruth M Dunne
- Division of Abdominal Imaging and Intervention, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St., Boston, MA 02115
| | - Paul B Shyn
- Division of Abdominal Imaging and Intervention, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St., Boston, MA 02115
| | - Kemal Tuncali
- Division of Abdominal Imaging and Intervention, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St., Boston, MA 02115
| | - Stuart G Silverman
- Division of Abdominal Imaging and Intervention, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St., Boston, MA 02115
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Percutaneous imaging-guided cryoablation of liver tumors: predicting local progression on 24-hour MRI. AJR Am J Roentgenol 2014; 203:W181-91. [PMID: 24555531 DOI: 10.2214/ajr.13.10747] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The purpose of this study was to determine which MRI features observed 24 hours after technically successful percutaneous cryoablation of liver tumors predict subsequent local tumor progression and to describe the evolution of imaging findings after cryoablation. MATERIALS AND METHODS Thirty-nine adult patients underwent technically successful imaging-guided percutaneous cryoablation of 54 liver tumors (hepatocellular carcinoma, 8; metastases, 46). MRI features pertaining to the tumor, ablation margin, and surrounding liver 24 hours after treatment were assessed independently by two readers. Fisher exact or Wilcoxon rank sum tests (significant p values < 0.05) were used to compare imaging features in patients with and without subsequent local tumor progression. Imaging features of the ablation margin, treated tumor, and surrounding liver were evaluated on serial MRI in the following year. RESULTS A minimum ablation margin of 3 mm or less was observed in 11 (78.6%) of 14 tumors with and 15 of 40 (37.5%) without progression (p = 0.012). A blood vessel bridging the ablation margin was noted in 11 of 14 (78.6%) tumors with and nine of 40 (22.5%) without progression (p < 0.001). The incidence of tumor enhancement 24 hours after cryoablation was similar for tumors with (10/14, 71.4%) or without (25/40, 62.5%) local progression (p = 0.75). MRI enabled assessment of the entire cryoablation margin in 49 of 54 (90.7%) treated tumors. CONCLUSION MRI features at 24 hours after liver cryoablation that were predictive of local tumor progression included a minimum ablation margin less than or equal to 3 mm and a blood vessel bridging the ablation margin. Persistent tumor enhancement is common after liver cryoablation and does not predict local tumor progression.
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Park BK, Kim CK, Park SY, Shen SH. Percutaneous radiofrequency ablation of renal cell carcinomas in patients with von Hippel Lindau disease: indications, techniques, complications, and outcomes. Acta Radiol 2013; 54:418-27. [PMID: 23446745 DOI: 10.1177/0284185113475441] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Renal cell carcinoma (RCC) in patients with von Hippel Lindau (VHL) disease tends to be multifocal, bilateral, and recur or develop new tumors after removal. These characteristics make treating hereditary RCCs difficult for urologists or radiologists compared to treating a sporadic RCC. Radiofrequency ablation (RFA) is a minimally-invasive treatment for small hereditary RCCs associated with a low complication rate and a minimal decrease in renal function. No RFA guidelines have been established about what to treat and when and how to ablate RCCs in patients with VHL disease. Besides, reports on complications and treatment outcomes in this patient group are rare. The purpose of this review is to discuss the indications, techniques, complications, and outcomes of RFA in treating RCC in patients with VHL disease.
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Affiliation(s)
- Byung Kwan Park
- The Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chan Kyo Kim
- The Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sung Yoon Park
- The Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Shu-Huei Shen
- The Department of Radiology, Taipei Veterans General Hospital and National Yang-Ming University School of Medicine, Taipei, Taiwan
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Fu EQ, Nan YD, Jin FG, Ma AQ. Therapeutic effects of sequential therapy by electric coagulation, cryotherapy and balloon dilation with an electronic video bronchoscope. Exp Ther Med 2013; 5:1649-1656. [PMID: 23837048 PMCID: PMC3702654 DOI: 10.3892/etm.2013.1031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 03/14/2013] [Indexed: 11/13/2022] Open
Abstract
The aim of the current study was to retrospectively analyze clinical data concerning bronchostenosis or bronchial obstruction caused by endobronchial tuberculosis. Fifty-six cases were subjected to bronchoscopy and chest computed tomography to assess the prognosis of bronchostenosis and bronchial obstruction. Based on reliable and effective anti-pulmonary tuberculosis therapy, these conditions were treated sequentially by electric coagulation, cryotherapy and balloon dilation with an electronic video bronchoscope during outpatient consultation or inpatient hospitalization. Fifty-three subjects with bronchostenosis recovered to varying degrees, a recovery rate of 94.6%. Thirteen of the 15 cases with bronchial obstruction reopened (86.7%). The clinical symptoms of these cases appeared to be in remission. Bronchostenosis or bronchial obstruction resulting from endobronchial tuberculosis may be treated by electric coagulation, cryotherapy and balloon dilation with an electronic video bronchoscope.
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Affiliation(s)
- En-Qing Fu
- Department of Cardiovascular Medicine, The First Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061; ; Department of Respiratory Medicine, Tangdu Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
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Bomers JGR, Yakar D, Overduin CG, Sedelaar JPM, Vergunst H, Barentsz JO, de Lange F, Fütterer JJ. MR imaging-guided focal cryoablation in patients with recurrent prostate cancer. Radiology 2013; 268:451-60. [PMID: 23525206 DOI: 10.1148/radiol.13121291] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To assess the feasibility of magnetic resonance (MR) imaging-guided focal cryoablation in patients with locally recurrent prostate cancer after radiation therapy. MATERIALS AND METHODS This was a prospective study, and informed consent was obtained from all patients. Ten consecutive patients with histopathologically proved recurrent prostate cancer after radiation therapy, without evidence of distant metastases, were treated while under general anesthesia in a 1.5-T MR unit. A urethral warmer was inserted. Cryoneedles were transperineally inserted under real-time MR imaging. Then, a rectal warmer was inserted. Ice ball growth was continuously monitored under MR imaging guidance. Two freeze-thaw cycles were performed. Follow-up consisted of a visit to the urologist, measurement of prostate-specific antigen level, and multiparametric MR imaging at 3, 6, and 12 months. Potential complications were recorded. RESULTS All patients were successfully treated. In one patient, the urethral warmer could not be inserted and the procedure was cancelled. Two months later, the procedure was successfully repeated. Another patient had urinary retention. Follow-up data were available for all patients. A local recurrence or remnant tumor was found in two patients after 6 months and in another patient after 12 months. These three patients underwent successful retreatment with MR imaging-guided focal cryoablation. CONCLUSION MR imaging-guided focal cryoablation of recurrent prostate cancer after radiation therapy is feasible and safe. Initial results are promising; however, longer follow-up is needed and more patients must be studied.
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Affiliation(s)
- Joyce G R Bomers
- Department of Radiology, Radboud University Nijmegen Medical Centre, Geert Grooteplein Zuid 10, 6525 GA Nijmegen, The Netherlands.
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Rothgang E, Gilson WD, Wacker F, Hornegger J, Lorenz CH, Weiss CR. Rapid freehand MR-guided percutaneous needle interventions: An image-based approach to improve workflow and feasibility. J Magn Reson Imaging 2013; 37:1202-12. [DOI: 10.1002/jmri.23894] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Accepted: 09/17/2012] [Indexed: 11/11/2022] Open
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Tatli S, Acar M, Tuncali K, Sadow CA, Morrison PR, Silverman SG. MRI assessment of percutaneous ablation of liver tumors: Value of subtraction images. J Magn Reson Imaging 2012; 37:407-13. [DOI: 10.1002/jmri.23827] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Correction of susceptibility-induced GRE phase shift for accurate PRFS thermometry proximal to cryoablation iceball. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2011; 25:23-31. [DOI: 10.1007/s10334-011-0277-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Revised: 07/23/2011] [Accepted: 08/10/2011] [Indexed: 10/17/2022]
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Park BK, Morrison PR, Tatli S, Govindarajulu U, Tuncali K, Judy P, Shyn PB, Silverman SG. Estimated effective dose of CT-guided percutaneous cryoablation of liver tumors. Eur J Radiol 2011; 81:1702-6. [PMID: 21645981 DOI: 10.1016/j.ejrad.2011.04.067] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 04/19/2011] [Accepted: 04/20/2011] [Indexed: 02/05/2023]
Abstract
PURPOSE To estimate effective dose during CT-guided cryoablation of liver tumors, and to assess which procedural factors contribute most to dose. MATERIALS AND METHODS Our institutional review board approved this retrospective, HIPAA-compliant study. A total of 20 CT-guided percutaneous liver tumor cryoablation procedures were performed in 18 patients. Effective dose was determined by multiplying the dose length product for each CT scan obtained during the procedure by a conversion factor (0.015mSv/mGy-cm), and calculating the sum for each phase of the procedure: planning, targeting, monitoring, and post-ablation survey. Effective dose of each phase was compared using a repeated measures analysis. Using Spearman correlation coefficients, effective doses were correlated with procedural factors including number of scans, ratio of targeting distance to tumor size, anesthesia type, number of applicators, performance of ancillary procedures (hydrodissection and biopsy), and use of CT fluoroscopy. RESULTS Effective dose per procedure was 72±18mSv. The effective dose of targeting (37.5±12.5mSv) was the largest component compared to the effective dose of the planning phase (4.8±2.2mSv), the monitoring phase (25.5±6.8mSv), and the post-ablation survey (4.1±1.9mSv) phase (p<0.05). Effective dose correlated positively only with the number of scans (p<0.01). CONCLUSIONS The effective dose of CT-guided percutaneous cryoablation of liver tumors can be substantial. Reducing the number of scans during the procedure is likely to have the greatest effect on lowering dose.
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Affiliation(s)
- Byung Kwan Park
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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Abstract
Locoregional therapies for hepatocellular carcinoma have progressed greatly in the last 30 years, beginning with the introduction of chemoembolization. Embolization techniques have evolved with the use of drug-eluting beads and radioembolization with yttrium-90. In the last 10 years, several new ablation techniques were developed including radiofrequency ablation, microwave ablation, cryoablation, laser ablation, and irreversible electroporation. Isolated or in combination, these techniques have already shown that they can improve patient survival and/or provide acceptable palliation.
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Affiliation(s)
- Marcelo Guimaraes
- Division of Vascular & Interventional Radiology, Medical University of South Carolina, 25 Courtenay Drive, MSC 226, Charleston, SC 29425, USA.
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Abstract
Medical imaging in interventional oncology is used differently than in diagnostic radiology and prioritizes different imaging features. Whereas diagnostic imaging prioritizes the highest-quality imaging, interventional imaging prioritizes real-time imaging with lower radiation dose in addition to high-quality imaging. In general, medical imaging plays five key roles in image-guided therapy, and interventional oncology, in particular. These roles are (a) preprocedure planning, (b) intraprocedural targeting, (c) intraprocedural monitoring, (d) intraprocedural control, and (e) postprocedure assessment. Although many of these roles are still relatively basic in interventional oncology, as research and development in medical imaging focuses on interventional needs, it is likely that the role of medical imaging in intervention will become even more integral and more widely applied. In this review, the current status of medical imaging for intervention in oncology will be described and directions for future development will be examined.
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Affiliation(s)
- Stephen B Solomon
- Department of Radiology, Memorial Sloan-Kettering Cancer Center, 1275 York Ave, New York, NY 10021, USA.
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McWilliams JP, Yamamoto S, Raman SS, Loh CT, Lee EW, Liu DM, Kee ST. Percutaneous ablation of hepatocellular carcinoma: current status. J Vasc Interv Radiol 2010; 21:S204-13. [PMID: 20656230 DOI: 10.1016/j.jvir.2009.11.025] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Revised: 10/28/2009] [Accepted: 11/07/2009] [Indexed: 02/08/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is an increasingly common disease with dismal long-term survival. Percutaneous ablation has gained popularity as a minimally invasive, potentially curative therapy for HCC in nonoperative candidates. The seminal technique of percutaneous ethanol injection has been largely supplanted by newer modalities, including radiofrequency ablation, microwave ablation, cryoablation, and high-intensity focused ultrasound ablation. A review of these modalities, including technical success, survival rates, and complications, will be presented, as well as considerations for treatment planning and follow-up.
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Affiliation(s)
- Justin P McWilliams
- Department of Interventional Radiology, University of California Los Angeles Medical Center, 757 Westwood Plaza, Suite 2125C, Los Angeles, CA 90095, USA.
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Erinjeri JP, Clark TWI. Cryoablation: mechanism of action and devices. J Vasc Interv Radiol 2010; 21:S187-91. [PMID: 20656228 DOI: 10.1016/j.jvir.2009.12.403] [Citation(s) in RCA: 192] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2009] [Revised: 11/23/2009] [Accepted: 12/30/2009] [Indexed: 12/18/2022] Open
Abstract
Cryoablation refers to all methods of destroying tissue by freezing. Cryoablation causes cellular damage, death, and necrosis of tissues by direct mechanisms, which cause cold-induced injury to cells, and indirect mechanisms, which cause changes to the cellular microenvironment and impair tissue viability. Cellular injury, both indirect and direct, can be influenced by four factors: cooling rate, target temperature, time at target temperature, and thawing rate. In this review, the authors describe the mechanisms of cellular injury that occur with cryoablation, the major advantages and disadvantages of cryoablation compared with other thermal ablation techniques, and the current commercially available cryoablation ablation systems.
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Affiliation(s)
- Joseph P Erinjeri
- Interventional Radiology Service, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, H118, New York, NY 10065, USA.
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Nett BE, Aagaard-Kienitz B, Serarslan Y, Başkaya MK, Chen GH. A simple technique for interventional tool placement combining fluoroscopy with interventional computed tomography on a C-arm system. Neurosurgery 2010; 67:ons49-56; discussion ons56-7. [PMID: 20679948 DOI: 10.1227/01.neu.0000382976.18891.50] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Flat-panel cone-beam computed tomography (FP-CBCT) has recently been introduced as a clinical feature in neuroangiography radiographic C-arm systems. OBJECTIVE To introduce a method of positioning a surgical tool such as a needle or ablation probe within a target specified by intraoperative FP-CBCT scanning. METHODS Two human cadaver and 2 porcine cadaver heads were injected with a mixture of silicone and contrast agent to simulate a contrast-enhanced tumor. Preoperative imaging was performed using a standard 1.5-T magnetic resonance imaging scanner. Intraoperative imaging was used to define the needle trajectory on a GE Innova 4100 flat panel-based neuroangiography C-arm system. RESULTS Using a combination of FP-CBCT and fluoroscopy, a needle was successfully positioned within each of the simulated contrast-enhanced tumors, as verified by subsequent FP-CBCT scans. CONCLUSIONS This proof-of-concept study demonstrates the potential utility of combining FP-CBCT scanning with fluoroscopy to position surgical tools when stereotactic devices and image-guided surgery systems are not available. However, further work is required to fully characterize the precision and accuracy of the method in a variety of realistic surgical sites.
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Affiliation(s)
- Brian E Nett
- Department of Medical Physics, University of Wisconsin-Madison, School of Medicine and Public Health, Madison, Wisconsin 53705, USA
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Kaye EA, Josan S, Lu A, Rosenberg J, Daniel BL, Pauly KB. Consistency of signal intensity and T2* in frozen ex vivo heart muscle, kidney, and liver tissue. J Magn Reson Imaging 2010; 31:719-24. [PMID: 20187218 DOI: 10.1002/jmri.22029] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
PURPOSE To investigate tissue dependence of the MRI-based thermometry in frozen tissue by quantification and comparison of signal intensity and T2* of ex vivo frozen tissue of three different types: heart muscle, kidney, and liver. MATERIALS AND METHODS Tissue samples were frozen and imaged on a 0.5 Tesla MRI scanner with ultrashort echo time (UTE) sequence. Signal intensity and T2* were determined as the temperature of the tissue samples was decreased from room temperature to approximately -40 degrees C. Statistical analysis was performed for (-20 degrees C, -5 degrees C) temperature interval. RESULTS The findings of this study demonstrate that signal intensity and T2* are consistent across three types of tissue for (-20 degrees C, -5 degrees C) temperature interval. CONCLUSION Both parameters can be used to calculate a single temperature calibration curve for all three types of tissue and potentially in the future serve as a foundation for tissue-independent MRI-based thermometry.
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Affiliation(s)
- Elena A Kaye
- Department of Electrical Engineering, Stanford University, Stanford, California, USA.
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Blezek DJ, Carlson DG, Cheng LT, Christensen JA, Callstrom MR, Erickson BJ. Cell accelerated cryoablation simulation. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2010; 98:241-252. [PMID: 19854531 DOI: 10.1016/j.cmpb.2009.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2009] [Revised: 08/17/2009] [Accepted: 09/03/2009] [Indexed: 05/28/2023]
Abstract
Tumor cryoablation is a clinical procedure where supercooled probes are used to destroy cancerous lesions. Cryoablation is a safe and effective palliative treatment for skeletal metastases, providing immediate and long term pain relief, increasing mobility and improving quality of life. Ideally, lesions are encompassed by an ice ball and frozen to a sufficiently low temperature to ensure cell death. "Lethal ice" is the term used to describe regions within the ice ball where cell death occurs. Failure to achieve lethal ice in all portions of a lesion may explain the high recurrence rate currently observed. Tracking growth of lethal ice is critical to success of percutaneous ablations, however, no practical methods currently exist for non-invasive temperature monitoring. Physicians lack planning tools which provide accurate estimation of the ice formation. Simulation of ice formation, while possible, is computationally demanding and too time consuming to be of clinical utility. We developed the computational framework for the simulation, acceleration strategies for multicore Intel x86 and IBM Cell architectures, and performed preliminary validation of the simulation. Our results demonstrate that the streaming SIMD implementation has better performance and scalability. Both accelerated and non-accelerated algorithms demonstrate good agreement between simulation and manually identified ice ball boundaries in phantom and patient images. Our results show promise for the development of novel cryoablation planning tools with real-time monitoring capability for clinical use.
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Affiliation(s)
- Daniel J Blezek
- Department of Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA.
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Rioja J, Tzortzis V, Mamoulakis C, Laguna M. Crioterapia de tumores renales: estado actual y desarrollos contemporáneos. Actas Urol Esp 2010. [DOI: 10.1016/j.acuro.2009.12.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fennessy FM, Tuncali K, Morrison PR, Tempany CM. MR imaging-guided interventions in the genitourinary tract: an evolving concept. Magn Reson Imaging Clin N Am 2010; 18:11-28. [PMID: 19962090 DOI: 10.1016/j.mric.2009.09.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
MR imaging-guided interventions are well established in routine patient care in many parts of the world. There are many approaches, depending on magnet design and clinical need, based on MR imaging providing excellent inherent tissue contrast without ionizing radiation risk for patients. MR imaging-guided minimally invasive therapeutic procedures have advantages over conventional surgical procedures. In the genitourinary tract, MR imaging guidance has a role in tumor detection, localization, and staging and can provide accurate image guidance for minimally invasive procedures. The advent of molecular and metabolic imaging and use of higher strength magnets likely will improve diagnostic accuracy and allow targeted therapy to maximize disease control and minimize side effects.
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Affiliation(s)
- Fiona M Fennessy
- Department of Radiology, Harvard Medical School/Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA.
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