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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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2450-MHz microwave ablation of liver metastases under 3.0 T wide-bore magnetic resonance guidance: a pilot study. Sci Rep 2022; 12:12640. [PMID: 35879411 PMCID: PMC9314346 DOI: 10.1038/s41598-022-16989-4] [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: 12/06/2021] [Accepted: 07/19/2022] [Indexed: 11/29/2022] Open
Abstract
To investigate the feasibility and effectiveness of 3.0 T wide-bore magnetic resonance (MR)-guided microwave ablation (MA) of liver metastases (LM). From October 2018 to May 2020, 39 patients with 63 LM were treated with 3.0 T wide-bore MR-guided 2450-MHz MA therapy. The procedure parameters, technical success, complications, biochemical index changes, local tumor response, local tumor progression (LTP), 12-month disease-free survival (DFS) and 12-month overall survival (OS) were recorded and analyzed. The mean tumor maximum diameter and total procedure time were 3.0 cm and 55.2 min, respectively. Technical success was 100%, but 5 cases (12.8%) had grade-1 complications. Alanine transaminase, aspartate transaminase and total bilirubin showed a slight transient increase on day 3 (P < 0.05) and returned to normal by day 30 (P > 0.05). The complete ablation rates for ≤ 2.5 and > 2.5 cm lesions were 100% and 92.5%, respectively. During the median follow-up of 12.0 months, the LTP rate was 4.8% (3/63), and the 12-month DFS and OS rates were 61.3% and 92.2%, respectively. 3.0 T wide-bore MR-guided MA for LM is a safe and effective approach, especially for small LM.
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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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Abdelkhalek Elhefni MM, Abd El Moety AA, Baddour NM, El Sayed Salem P. The Role of Human U Three Protein 14a as a Predictor for Hepatocellular Carcinoma Recurrence After Microwave Ablation. Appl Immunohistochem Mol Morphol 2022; 30:171-177. [PMID: 35262522 DOI: 10.1097/pai.0000000000000994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 10/04/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Human U three protein 14a (hUTP14a) is a nucleolar protein which promotes carcinogenesis by causing degradation of the tumor suppressor protein, p53. AIMS This study aimed to investigate hUTP14a expression in hepatocellular carcinoma (HCC) and its value as a predictor for HCC recurrence after treatment with microwave ablation (MWA). MATERIALS AND METHODS The hUTP14a expression was evaluated using immunohistochemistry on ultrasound-guided fine needle aspiration biopsy material from the tumor and the surrounding cirrhotic nontumor tissues. The relation between hUTP14a expression and clinic-pathologic variables was analyzed. RESULTS Nuclear hUTP14a showed significant high expression in HCC tumor tissue compared with corresponding nontumor tissue (P<0.001). Tumoral hUTP14a expression was significantly higher in patients who experienced recurrence than those who were recurrence-free after MWA (P<0.001). CONCLUSION We concluded that, hUTP14a has an oncogenic potential, as it is highly expressed in HCC tissues compared with surrounding nontumor cirrhotic tissues. Moreover, nuclear hUTP14a could be used as a promising prognostic biomarker for prediction of HCC recurrence after treatment with MWA.
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Affiliation(s)
| | | | - Nahed M Baddour
- Pathology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
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Winkelmann MT, Gohla G, Kübler J, Weiß J, Clasen S, Nikolaou K, Hoffmann R. MR-Guided High-Power Microwave Ablation in Hepatic Malignancies: Initial Results in Clinical Routine. Cardiovasc Intervent Radiol 2020; 43:1631-1638. [PMID: 32699978 PMCID: PMC7591402 DOI: 10.1007/s00270-020-02584-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/26/2020] [Indexed: 12/15/2022]
Abstract
PURPOSE Evaluation of technique effectiveness, patient safety and ablation parameters of MR-guided microwave ablation in hepatic malignancies using an MR-conditional high-power microwave ablation system. MATERIALS AND METHODS Institutional review board approval and informed patient consent were obtained. Patients who underwent MR-guided microwave ablation of hepatic malignancies in a 1.5T wide-bore scanner using a perfusion-cooled high-power microwave ablation system with a maximum generator power of 150 W were included. Ablation parameters comprising procedure durations, net ablation duration, applicator positions and ablation zone dimensions were recorded. Adverse events were classified according to the CIRSE classification system. Technique effectiveness was assessed after 1 month. Follow-up was conducted with contrast-enhanced MRI and ranged from 1 to 20 months (mean: 6.1 ± 5.4 months). RESULTS Twenty-one consecutive patients (age: 63.4 ± 10.5 years; 5 female) underwent 22 procedures for 28 tumours (9 hepatocellular carcinomas, 19 metastases) with a mean tumour diameter of 14.6 ± 5.4 mm (range: 6-24 mm). Technique effectiveness was achieved in all lesions. Tumours were treated using 1.7 ± 0.7 applicator positions (range: 1-3). Mean energy and ablation duration per tumour were 75.3 ± 35.4 kJ and 13.3 ± 6.2 min, respectively. Coagulation zone short- and long-axis diameters were 29.1 ± 6.4 mm and 39.9 ± 7.4 mm, respectively. Average procedure duration was 146.4 ± 26.2 min (range: 98-187 min). One minor complication was reported. Five patients developed new tumour manifestations in the untreated liver. Local tumour progression was not observed during initial follow-up. CONCLUSION MR-guided high-power microwave ablation provides safe and effective treatment of hepatic malignancies with short ablation times and within acceptable procedure durations.
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Affiliation(s)
- Moritz T Winkelmann
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Strasse 3, 72076, Tübingen, Germany
| | - Georg Gohla
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Strasse 3, 72076, Tübingen, Germany
| | - Jens Kübler
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Strasse 3, 72076, Tübingen, Germany
| | - Jakob Weiß
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Strasse 3, 72076, Tübingen, Germany
| | - Stephan Clasen
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Strasse 3, 72076, Tübingen, Germany
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Strasse 3, 72076, Tübingen, Germany
| | - Rüdiger Hoffmann
- Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University, Hoppe-Seyler-Strasse 3, 72076, Tübingen, Germany.
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