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Dai R, Uppot R, Arellano R, Kalva S. Image-guided Ablative Procedures. Clin Oncol (R Coll Radiol) 2024; 36:484-497. [PMID: 38087706 DOI: 10.1016/j.clon.2023.11.037] [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: 08/12/2023] [Revised: 09/19/2023] [Accepted: 11/21/2023] [Indexed: 07/09/2024]
Abstract
Various image-guided ablative procedures include chemical and thermal ablation techniques and irreversible electroporation. These have been used for curative intent for small tumours and palliative intent for debulking, immunogenicity and pain control. Understanding these techniques is critical to avoiding complications and achieving superior clinical outcomes. Additionally, combination with immunotherapy and chemotherapies is rapidly evolving. There are numerous opportunities in interventional radiology to advance ablation techniques and seamlessly integrate into current treatment regimens for both benign and malignant tumours.
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Affiliation(s)
- R Dai
- Massachusetts General Hospital, Department of Radiology, Division of Intervention Radiology, Boston, Massachusetts, USA.
| | - R Uppot
- Massachusetts General Hospital, Department of Radiology, Division of Intervention Radiology, Boston, Massachusetts, USA
| | - R Arellano
- Massachusetts General Hospital, Department of Radiology, Division of Intervention Radiology, Boston, Massachusetts, USA
| | - S Kalva
- Massachusetts General Hospital, Department of Radiology, Division of Intervention Radiology, Boston, Massachusetts, USA
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2
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Sung D, Rejimon A, Allen JW, Fedorov AG, Fleischer CC. Predicting brain temperature in humans using bioheat models: Progress and outlook. J Cereb Blood Flow Metab 2023; 43:833-842. [PMID: 36883416 PMCID: PMC10196749 DOI: 10.1177/0271678x231162173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 03/09/2023]
Abstract
Brain temperature, regulated by the balance between blood circulation and metabolic heat generation, is an important parameter related to neural activity, cerebral hemodynamics, and neuroinflammation. A key challenge for integrating brain temperature into clinical practice is the lack of reliable and non-invasive brain thermometry. The recognized importance of brain temperature and thermoregulation in both health and disease, combined with limited availability of experimental methods, has motivated the development of computational thermal models using bioheat equations to predict brain temperature. In this mini-review, we describe progress and the current state-of-the-art in brain thermal modeling in humans and discuss potential avenues for clinical applications.
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Affiliation(s)
- Dongsuk Sung
- Department of Biomedical
Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA,
USA
- Department of Radiology and Imaging
Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - Abinand Rejimon
- Department of Biomedical
Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA,
USA
- Department of Radiology and Imaging
Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - Jason W Allen
- Department of Biomedical
Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA,
USA
- Department of Radiology and Imaging
Sciences, Emory University School of Medicine, Atlanta, GA, USA
- Department of Neurology, Emory
University School of Medicine, Atlanta, GA, USA
| | - Andrei G Fedorov
- Woodruff School of Mechanical
Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering
and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Candace C Fleischer
- Department of Biomedical
Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA,
USA
- Department of Radiology and Imaging
Sciences, Emory University School of Medicine, Atlanta, GA, USA
- Petit Institute for Bioengineering
and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
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3
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Audigier C, Mohaiu AT, Alzaga A, Bale R, Mansi T. A comparative study on computational models of multi-electrode radiofrequency ablation of large liver tumors. Int J Comput Assist Radiol Surg 2022; 17:1489-1496. [PMID: 35776400 DOI: 10.1007/s11548-022-02689-x] [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: 02/21/2022] [Accepted: 05/24/2022] [Indexed: 11/30/2022]
Abstract
PURPOSE Thermal ablation of liver tumors has emerged as a first-line curative treatment for single small tumors (diameter < 2.5 cm) due to similar overall survival rates as surgical resection. Moreover, it is far less invasive, has lower complication rates, a superior cost-effectiveness, and an extremely low treatment-associated mortality. However, in many cases, complete tumor coverage cannot be achieved only with a single electrode and several electrodes are used to create overlapping ablations. Multi-electrode planning is a challenging 3D task with many contradictive constraints to consider, a dimensionality difficult to assess even for experts. It requires extremely long planning time since it is mostly performed mentally by clinicians looking at 2D CT views. An accurate and reliable prediction of the ablation zone would help to turn thermal ablation into a first-line curative treatment also for large liver tumors treated with multiple electrodes. In order to determine the level of model simplification that can be acceptable, we compared three computational models, a simple spherical model, a biophysics-based model and an Eikonal model. METHODS RF ablation electrodes were virtually placed at a desired position in the patient pre-operative CT image and the models predicted the ablation zone generated by multiple electrodes. The last two models are patient-specific. In these cases, hepatic structures were automatically segmented from the pre-operative CT images to predict a patient-specific ablation zone. RESULTS The three models were used to simulate multiple electrode ablations on 12 large tumors from 11 patients for which the procedure information was available. Biophysics-based simulations approximate better the post-operative ablation zone in term of Hausdorff distance, Dice Similarity Coefficient, radius, and volume compared to two other methods. It also predicts better the coverage percentage and thus the tumor ablation margin. CONCLUSION The results obtained with the biophysics-based model indicate that it could improve ablation planning by accurately predicting the ablation zone, avoiding over or under-treatment. This is particularly beneficial for multi-electrode radiofrequency ablation of larger liver tumors where the planning phase is particularly challenging.
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Affiliation(s)
- Chloé Audigier
- Advanced Clinical Imaging Technology, Siemens Healthcare, Lausanne, Switzerland.
| | | | | | - Reto Bale
- Innsbruck University Hospital, Innsbruck, Austria
| | - Tommaso Mansi
- Siemens Healthineers, Digital Technology and Innovation, Princeton, NJ, USA
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4
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Schullian P, Laimer G, Johnston E, Putzer D, Eberle G, Scharll Y, Widmann G, Kolbitsch C, Bale R. Technical efficacy and local recurrence after stereotactic radiofrequency ablation of 2653 liver tumors: a 15-year single-center experience with evaluation of prognostic factors. Int J Hyperthermia 2022; 39:421-430. [PMID: 35227136 DOI: 10.1080/02656736.2022.2044522] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
PURPOSE To assess the technical outcome and local tumor control of multi-probe stereotactic radiofrequency ablation (SRFA) in a large series of patients. Furthermore, to determine factors accounting for adverse outcomes. MATERIAL AND METHODS Between 2003 and 2018, 865 patients were treated by SRFA for 2653 primary and metastatic liver tumors with a median tumor size of 2.0 cm (0.5 - 19 cm). Primary technical efficacy (PTE) and local recurrence (LR) were evaluated, and possible predictors for adverse events analyzed using uni- and multi-variable binary logistic regression. RESULTS Overall, 2553 of 2653 tumors were successfully ablated at initial SRFA resulting in a PTE rate of 96.2%. Predictors of lower PTE rates were age > 70 years, tumor size > 5 cm, number of probes, location close to liver capsule/organs and segment II. LR occurred in 220 of 2653 tumors (8.3%) with the following predictors: age, tumor type/size, conglomerates, segments I/IVa/IVb, number of probes and location close to major vessels/bile duct. Multivariable analysis revealed tumor size > 5 cm (odds ratio [OR] 3.153), age > 70 years (OR 1.559), and location in segment II (OR 1.772) as independent prognostic factors for PTE, whereas tumor location close to major vessels (OR 1.653) and in segment IVb (OR 2.656) were identified as independent prognostic factors of LR. CONCLUSIONS Stereotactic RFA is an attractive option in the management of primary or metastatic liver tumors with good local tumor control, even in large tumors. The presented prognostic factors for adverse local oncological outcome might help to stratify unfavorable tumors for ablation.
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Affiliation(s)
- Peter Schullian
- Department of Radiology, Section of Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Gregor Laimer
- Department of Radiology, Section of Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | | | - Daniel Putzer
- Department of Radiology, Section of Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Gernot Eberle
- Department of Radiology, Section of Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Yannick Scharll
- Department of Radiology, Section of Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Gerlig Widmann
- Department of Radiology, Section of Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Christian Kolbitsch
- Department of Anesthesia, Medical University of Innsbruck, Innsbruck, Austria
| | - Reto Bale
- Department of Radiology, Section of Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
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5
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Tan Y, Wang X, Ma K, Zhang L, Li J, Chen P, Zhang B. Risk factors for the recurrence of early hepatocellular carcinoma treated by percutaneous radiofrequency ablation with a multiple-electrode switching system: a multicenter prospective study. Int J Hyperthermia 2022; 39:190-199. [PMID: 35042449 DOI: 10.1080/02656736.2021.2024279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
PURPOSE To investigate the long-term efficacy of radiofrequency ablation (RFA) with a multiple-electrode switching system (MESS) in the treatment of early hepatocellular carcinoma (HCC) and evaluate the patterns and risk factors of intrahepatic recurrence of HCC after RFA. METHODS In total, 139 patients with early HCC who underwent RFA with MESS as primary treatment at multiple centers were prospectively enrolled according to the inclusion criteria. We evaluated the local tumor progression (LTP), intrahepatic distant recurrence (IDR), the incidence of cumulative disease-free survival (DFS), LTP-free survival, IDR-free survival, and overall survival. We also analyzed the associated risk factors. RESULTS A total of 139 patients were included in the study and the median follow-up time was 64 months, ranging from 11 to 72 months. The complete ablation rate was 98.56%. Sixty-nine (49.64%) were found to have intrahepatic recurrence (LTP, n = 15; IDR, n = 55) during follow-up. The 1-year, 3-year and 5-year cumulative DFS, LTP-free survival, and IDR-free survival rates were 74.82, 94.46 and 78.75%; 54.68, 88.03 and 61.79%; and 51.80, 85.67 and 60.17%, respectively. In the multivariable analysis, tumor size > 4 cm was the only important risk factor for LTP. The alkaline phosphatase (ALP) level and the number of tumors were independent risk factors for IDR; α-fetoprotein (AFP) level > 400 µg/L and recurrence interval were risk factors for the overall survival period. CONCLUSIONS The MESS-RFA is an effective method for local control of tumors in early HCC. Early HCC with multiple high-ALP tumors has a higher rate of recurrence, which mainly occurs in an IDR pattern. Early HCC with high AFP levels and a shorter initial recurrence interval resulted in a poorer prognosis. Thus, treatments such as liver transplantation or surgical resection may be a good strategy in those cases. CLINICALTRIALS.GOV ID NCT02046356.
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Affiliation(s)
- Yunhua Tan
- Department of Epidemiology and Biostatistics, First Affiliated Hospital, Army Medical University, Chongqing, PR China
| | - Xin Wang
- Department of Epidemiology and Biostatistics, First Affiliated Hospital, Army Medical University, Chongqing, PR China
| | - Kuansheng Ma
- Institute of Hepatobiliary Surgery, Southwest Hospital, Army Medical University, Chongqing, PR China
| | - Lin Zhang
- Department of Radiation, Southwest Hospital, Army Medical University, Chongqing, PR China
| | - Jing Li
- Department of Hepatobiliary Surgery, Xinqiao Hospital, Army Medical University, Chongqing, PR China
| | - Ping Chen
- Department of Hepatobiliary Surgery, Daping Hospital, Army Medical University, Chongqing, PR China
| | - Ben Zhang
- Department of Epidemiology and Biostatistics, First Affiliated Hospital, Army Medical University, Chongqing, PR China
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6
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Hsiao CY, Yang PC, Huang KW. Linear radiofrequency ablation using dual switching-control mode achieves rapid and bloodless liver resection, an experimental research. Int J Hyperthermia 2021; 38:357-362. [PMID: 33641575 DOI: 10.1080/02656736.2021.1892215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND Radiofrequency (RF)-assisted devices are widely used for hemostasis during liver resection. This study compared the use of dual switching (DS) versus single switching (SS) control modes for RF-based liver resections in a pig model. METHODS The RF-based system comprised a 200-W generator and three electrodes with 4-cm tips arranged in a linear configuration using an adaptor. Eight Lanyu pigs were used to assess ablation outcomes with electrode spacing of 2 or 3 cm, and ablation durations of 1.5, 2 or 3 min. All combinations were tested in DS and SS modes. Procedures were performed on left lateral, caudal and right anterior liver lobes, and after which transections were performed using a scalpel. Blood loss, complete ablation rate and ablation speed were compared. RESULTS DS mode was shown to induce significantly less blood loss than SS mode when the electrode spacing was set at 2 cm and the ablation duration was 2 min or 3 min (p=.010 and .012, respectively). Extended ablation duration and narrow electrode spacing tended to induce less blood loss, regardless of operating mode. Bloodless resection was achieved using DS mode with electrode spacing of 2 cm and ablation duration of 2-3 min. The highest rate of complete ablation (11.3 cm2/min) was achieved using DS mode with electrode spacing of 2 cm and ablation duration of 1.5 min. CONCLUSION RF-based hepatic resection using DS mode is safe and feasible, resulting in less blood loss than SS mode with a higher rate of complete ablation (i.e., superior ablation efficiency).
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Affiliation(s)
- Chih-Yang Hsiao
- College of Medicine, Graduate Institute of Clinical Medicine, National Taiwan University, Taipei, Taiwan.,Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan.,Department of Traumatology, National Taiwan University Hospital, Taipei, Taiwan
| | - Po-Chih Yang
- College of Medicine, Graduate Institute of Clinical Medicine, National Taiwan University, Taipei, Taiwan.,Center for Organ Transplantation and Liver Disease Treatment, Fu Jen Catholic University Hospital, New Taipei City, Taiwan
| | - Kai-Wen Huang
- College of Medicine, Graduate Institute of Clinical Medicine, National Taiwan University, Taipei, Taiwan.,Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan.,Hepatitis Research Center, National Taiwan University Hospital, Taipei, Taiwan.,Centre of Mini-invasive Interventional Oncology, National Taiwan University Hospital, Taipei, Taiwan
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7
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Hetzer B, Vogel GF, Entenmann A, Heil M, Schullian P, Putzer D, Meister B, Crazzolara R, Kropshofer G, Salvador C, Straub S, Karall D, Niederwanger C, Cortina G, Janecke A, Freund-Unsinn K, Maurer K, Schweigmann G, Oberhuber G, Renz O, Schneeberger S, Müller T, Bale R. Stereotactic radiofrequency ablation of a variety of liver masses in children. Int J Hyperthermia 2021; 37:1074-1081. [PMID: 32954876 DOI: 10.1080/02656736.2020.1822549] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND AND AIMS Surgical resection is currently the cornerstone of liver tumor treatment in children. In adults radiofrequency ablation (RFA) is an established minimally invasive treatment option for small focal liver tumors. Multiprobe stereotactic RFA (SRFA) with intraoperative image fusion to confirm ablation margins allows treatment for large lesions. We describe our experience with SRFA in children with liver masses. METHODS SRFA was performed in 10 patients with a median age of 14 years (range 0.5-17.0 years) suffering from liver adenoma (n = 3), hepatocellular carcinoma (n = 1), hepatoblastoma (n = 2), myofibroblastic tumor (n = 1), hepatic metastases of extrahepatic tumors (n = 2) and infiltrative hepatic cysts associated with alveolar echinococcosis (n = 1). Overall, 15 lesions with a mean lesion size of 2.6 cm (range 0.7-9.5 cm) were treated in 11 sessions. RESULTS The technical success rate was 100%, as was the survival rate. No transient adverse effects higher than grade II (Clavien and Dindo) were encountered after interventions. The median hospital stay was 5 d (range 2-33 d). In two patients who subsequently underwent transplant hepatectomy complete ablation was histologically confirmed. Follow-up imaging studies (median 55 months, range 18-129 months) revealed no local or distant recurrence of disease in any patient. CONCLUSIONS SRFA is an effective minimal-invasive treatment option in pediatric patients with liver tumors of different etiologies.
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Affiliation(s)
- Benjamin Hetzer
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Andreas Entenmann
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Michel Heil
- Department of Radiology, Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Peter Schullian
- Department of Radiology, Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Daniel Putzer
- Department of Radiology, Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Bernhard Meister
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Roman Crazzolara
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Gabriele Kropshofer
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Christina Salvador
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Simon Straub
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Daniela Karall
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Gérard Cortina
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Andreas Janecke
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Karin Freund-Unsinn
- Department of Radiology, Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Kathrin Maurer
- Department of Radiology, Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Gisela Schweigmann
- Department of Radiology, Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
| | - Georg Oberhuber
- INNPATH, Institute of Pathology, Tirol Kliniken Innsbruck, Innsbruck, Austria
| | - Oliver Renz
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Stefan Schneeberger
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Thomas Müller
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Reto Bale
- Department of Radiology, Interventional Oncology-Microinvasive Therapy (SIP), Medical University of Innsbruck, Innsbruck, Austria
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8
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Lin CC, Lui KW, Chen WT, Hsieh YC, Cheng YT, Teng W, Lin SM. Switching monopolar radiofrequency ablation improves long-term outcomes of medium-sized hepatocellular carcinoma. Eur Radiol 2021; 31:8649-8661. [PMID: 33895858 DOI: 10.1007/s00330-021-07729-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 12/24/2020] [Accepted: 01/28/2021] [Indexed: 12/17/2022]
Abstract
OBJECTIVES Radiofrequency ablation (RFA) of medium-sized (3-5 cm) hepatocellular carcinoma (HCC) is suboptimal. Switching monopolar RFA (SW-RFA) enlarges the ablative volume to better cover larger tumors. This study aims to compare the long-term outcomes of medium-sized HCC treated by either SW-RFA or single-monopolar RFA (S-RFA). METHODS We retrospectively reviewed 139 cases (147 medium-size HCC) between 2008 and 2014. Under propensity score matching, a total of 43 paired patients with medium-size HCC and balanced clinical variables treated by either SW-RFA or S-RFA were selected for comparison. RESULTS SW-RFA showed a higher rate of achieving an adequate safety margin (p = 0.002). After a mean follow-up period of 40.4 months, SW-RFA produced significantly lower global RFA failure rates (p < 0.001) and better overall survival (p = 0.005) compared to S-RFA. SW-RFA was independently associated with a decreased risk of global RFA failure (hazard ratio [HR]: 0.136, 95% confidence interval [CI]: 0.030-0.607, p = 0.009) and improved overall survival (HR: 0.337, 95% CI: 0.152-0.747, p = 0.007). By last follow-up, the SW-RFA group maintained a superior tumor-free rate (p = 0.010) and fewer progressions to Barcelona Clinic Liver Cancer stage C (p = 0.011). Major complication rates were comparable in both groups (SW-RFA: 2.3% vs. S-RFA: 4.7%, p = 1.000). CONCLUSIONS The switching multi-monopolar ablation technique could be beneficial for patients with medium-sized HCCs given sustained control of larger tumors with better overall survival. KEY POINTS • Switching monopolar ablation could provide a sustained local tumor control and better overall survival than single-monopolar ablation for the medium-sized hepatocellular carcinoma. • Compared to single-monopolar ablation, switching monopolar ablation could create a larger homogeneous coagulation volume by using a shorter total ablation time to achieve a higher rate of adequate safety margin for a medium-sized HCC. • Patients with medium-sized HCC can be maintained at a higher rate of tumor-free status and at a lower risk of progression into BCLC stage C in the follow-up period after ablation by switching monopolar than by single-monopolar ablation.
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Affiliation(s)
- Chen-Chun Lin
- Division of Hepatology, Liver Research Unit, Department of Gastroenterology and Hepatology, Linkou Chang Gung Memorial Hospital, Chang Gung University, 5, Fu-Hsin St., Kwei-Shan, Taoyuan, Taiwan, 333
| | - Kar-Wai Lui
- Department of Medical Imaging & Intervention, Linkou Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Wei-Ting Chen
- Division of Hepatology, Liver Research Unit, Department of Gastroenterology and Hepatology, Linkou Chang Gung Memorial Hospital, Chang Gung University, 5, Fu-Hsin St., Kwei-Shan, Taoyuan, Taiwan, 333
| | - Yi-Chung Hsieh
- Division of Hepatology, Liver Research Unit, Department of Gastroenterology and Hepatology, Linkou Chang Gung Memorial Hospital, Chang Gung University, 5, Fu-Hsin St., Kwei-Shan, Taoyuan, Taiwan, 333
| | - Ya-Ting Cheng
- Division of Hepatology, Liver Research Unit, Department of Gastroenterology and Hepatology, Linkou Chang Gung Memorial Hospital, Chang Gung University, 5, Fu-Hsin St., Kwei-Shan, Taoyuan, Taiwan, 333
| | - Wei Teng
- Division of Hepatology, Liver Research Unit, Department of Gastroenterology and Hepatology, Linkou Chang Gung Memorial Hospital, Chang Gung University, 5, Fu-Hsin St., Kwei-Shan, Taoyuan, Taiwan, 333
| | - Shi-Ming Lin
- Division of Hepatology, Liver Research Unit, Department of Gastroenterology and Hepatology, Linkou Chang Gung Memorial Hospital, Chang Gung University, 5, Fu-Hsin St., Kwei-Shan, Taoyuan, Taiwan, 333.
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9
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Huang GL, Liu M, Zhang XE, Liu BX, Xu M, Lin MX, Kuang M, Lu MD, Xie XY. Multiple-Electrode Switching-Based Radiofrequency Ablation vs. Conventional Radiofrequency Ablation for Single Early-Stage Hepatocellular Carcinoma Ranging From 2 to 5 Cm. Front Oncol 2020; 10:1150. [PMID: 32793484 PMCID: PMC7393260 DOI: 10.3389/fonc.2020.01150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 06/08/2020] [Indexed: 12/25/2022] Open
Abstract
Purpose: To retrospectively compare the treatment outcome of multiple-electrode switching-based radiofrequency ablation (switching RFA) and the conventional RFA for early-stage hepatocellular carcinoma (HCC). Methods: A total of 122 patients with single early-stage HCC ranging from 2.1 to 5.0 cm received ultrasonography-guided percutaneous RFA as the first-line treatment. Seventy-one patients underwent switching RFA, and 51 underwent conventional RFA. Tumor response, major complication, local tumor progression (LTP), and overall survival (OS) were compared between the two groups. Log-rank tests and Cox regression models were used for univariate and multivariate analyses to identify predictors of LTP and OS. Results: The rate of initial local complete response rates were 100% (71/71) in the switching RFA group and 98.0% (50/51) in the conventional RFA group (P > 0.05). No major complication occurred in the switching RFA group, whereas two in the conventional RFA group. After a median follow-up period of 45.9 months (range, 9.8-60.0 months), the rates of LTP in the switching RFA and conventional RFA groups were 19.7% (14/71) and 41.2% (21/51), respectively. The cumulative LTP rates at 1, 3, and 5 years were 11.3, 20.5, and 20.5% for switching RFA and 17.6, 38.7, and 46.7% for conventional RFA, respectively (p < 0.001). Switching RFA was an independent factor associated with a lower LTP rate (p = 0.022). Five-year OS rates were 75.8% after switching RFA vs. 66.2% after conventional RFA (p = 0.363). Extrahepatic recurrence was a significant prognostic factor for OS in multivariable analysis. Conclusion: Compared with conventional RFA, switching RFA provides a high local tumor control for single early-stage HCC. An ongoing randomized trial might help to clarify the role of this approach for the treatment of HCC.
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Affiliation(s)
- Guang-Liang Huang
- Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Ming Liu
- Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiao-Er Zhang
- Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Bao-Xian Liu
- Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Ming Xu
- Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Man-Xia Lin
- Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Ming Kuang
- Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Department of Liver Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Ming-de Lu
- Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Department of Liver Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiao-Yan Xie
- Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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10
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Percutaneous Radiofrequency Ablation With a Multiple-Electrode Switching System for Medium-Sized Hepatocellular Carcinomas. Int Surg 2020. [DOI: 10.9738/intsurg-d-16-00269.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective
This study aimed to retrospectively evaluate the safety and short-term therapeutic efficacy of radiofrequency ablation (RFA) with a multiple-electrode switching system (MESS) to treat medium-sized (3.1–5.0 cm) hepatocellular carcinomas (HCCs).
Summary of Background Data
Conventional monopolar RFA is limited in achieving local control for tumors larger than 3 cm. Therefore, MESS-RFA was developed, and it can create a sufficiently large ablation volume, including the target tumor and a 5- to 10-mm safety margin in medium-sized tumors.
Methods
We performed a total of 168 RFAs with a MESS for 166 patients. The patients were treated under ultrasonographic guidance by a percutaneous switching system RFA with a multichannel RF generator and 2 or 3 internally cooled electrodes. Technical effectiveness, local progression, and remote recurrence of HCC were determined.
Results
For the 166 isolated HCC tumors, the complete ablation rate of MESS-RFA was 98.79% (164 of 166). Mean ablation time per procedure was 12.33 ± 3.01 minutes; mean ablation diameter was 5.79 ± 0.61 cm. The complication rate was 2.41%. During follow-up (averaging 16.54 months), local tumor progression occurred in 15 of 166 patients (9.03%) with technical effectiveness, whereas new HCCs were detected in 40 of 166 patients (24.09%). Multivariate analyses revealed that local tumor progression was only associated with serum α-fetoprotein levels above 100 ng/mL as a risk factor.
Conclusion
MESS-RFA for achieving sufficient ablation volume is safe and efficient. This method also showed relatively successful therapeutic effectiveness on short-term follow-up in the treatment of medium-sized HCCs.
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Schullian P, Johnston EW, Putzer D, Eberle G, Laimer G, Bale R. Safety and efficacy of stereotactic radiofrequency ablation for very large (≥8 cm) primary and metastatic liver tumors. Sci Rep 2020; 10:1618. [PMID: 32005871 PMCID: PMC6994461 DOI: 10.1038/s41598-020-58383-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 01/13/2020] [Indexed: 12/15/2022] Open
Abstract
To assess the safety and clinical outcomes of multi-probe stereotactic radiofrequency ablation (SRFA) for very large (≥8 cm) primary and metastatic liver tumors with curative treatment intent. A retrospective, single center study carried out between 01.2005 and 06.2018. 34 consecutive patients had a total of 41 primary and metastatic liver tumors with a median size of 9.0 cm (8.0–18.0 cm) at initial SRFA. Patients were treated under CT guidance using a 3D navigation system. Endpoints consisted of (i) technical efficacy; primary - requiring one treatment, and secondary – requiring two treatments (ii) complication and mortality rates (iii) local and distant recurrence (LR), (iv) disease free survival (DFS), (v) overall survival (OS). 33/41 tumors were successfully ablated at initial SRFA (80.5% primary technical efficacy rate (PTE)). Four tumors required repeat ablation, resulting in a secondary technical efficacy (STE) rate of 90.2%. Local tumor recurrence (LR) developed in 4 of 41 tumors (9.8%). The 30-day perioperative mortality was 2.3% (1/ 44 ablations). The total major complication rate was 20.5% (9 of 44 ablations). Three of nine (33.3%) major complications, such as pleural effusion, pneumothoraces or perihepatic hemorrhages were relatively easy to treat. The overall survival (OS) rates at 1-, 3-, and 5- years from the date of the first SRFA were 87.1%, 71.8%, and 62.8% for patients with hepatocellular carcinoma (HCC) and 87.5%, 70.0% and 70.0% for patients with intrahepatic cholangiocarcinoma (ICC) respectively. Patients with metastatic disease had OS rates of 77.8% and 22.2% at 1- and 3- years. The clinical results of SRFA in this study are encouraging and warrant a prospective multicenter study. SRFA may become one of the best therapeutic choices for a growing number of patients with primary and metastatic liver cancer.
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Affiliation(s)
- Peter Schullian
- From the Department of Radiology, Section of Interventional Oncology - Microinvasive Therapy (SIP), Medical University of Innsbruck, Anichstr. 35, 6020, Innsbruck, Austria
| | - Edward W Johnston
- From the Department of Radiology, King's College Hospital, Denmark Hill, London, SE5 9RS, UK
| | - Daniel Putzer
- From the Department of Radiology, Section of Interventional Oncology - Microinvasive Therapy (SIP), Medical University of Innsbruck, Anichstr. 35, 6020, Innsbruck, Austria
| | - Gernot Eberle
- From the Department of Radiology, Section of Interventional Oncology - Microinvasive Therapy (SIP), Medical University of Innsbruck, Anichstr. 35, 6020, Innsbruck, Austria
| | - Gregor Laimer
- From the Department of Radiology, Section of Interventional Oncology - Microinvasive Therapy (SIP), Medical University of Innsbruck, Anichstr. 35, 6020, Innsbruck, Austria
| | - Reto Bale
- From the Department of Radiology, Section of Interventional Oncology - Microinvasive Therapy (SIP), Medical University of Innsbruck, Anichstr. 35, 6020, Innsbruck, Austria.
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Sato Y, Hasegawa T, Chatani S, Murata S, Inaba Y. Percutaneous Radiofrequency Ablation for Liver Tumors: Technical Tips. INTERVENTIONAL RADIOLOGY 2020; 5:50-57. [PMID: 36284662 PMCID: PMC9550427 DOI: 10.22575/interventionalradiology.2020-0008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 04/16/2020] [Indexed: 02/07/2023]
Abstract
Percutaneous radiofrequency ablation (RFA) has been accepted as a minimally invasive therapeutic treatment for liver malignancies. Although RFA is usually applied for the treatment of small liver tumors (<3 cm), several technical developments have expanded the use of RFA. RFA is now used for the treatment of large liver tumors, and the number of complications associated with this treatment has decreased. These refinements may ultimately lead to better long-term prognosis. Here, we review recent refinements of liver RFA and provide technical tips.
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Affiliation(s)
- Yozo Sato
- Department of Diagnostic and Interventional Radiology, Aichi Cancer Center Hospital
| | - Takaaki Hasegawa
- Department of Diagnostic and Interventional Radiology, Aichi Cancer Center Hospital
| | - Shohei Chatani
- Department of Diagnostic and Interventional Radiology, Aichi Cancer Center Hospital
| | - Shinichi Murata
- Department of Diagnostic and Interventional Radiology, Aichi Cancer Center Hospital
| | - Yoshitaka Inaba
- Department of Diagnostic and Interventional Radiology, Aichi Cancer Center Hospital
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Ben-David E, Nissenbaum I, Gurevich S, Cosman ER, Goldberg SN. Optimization and characterization of a novel internally-cooled radiofrequency ablation system with optimized pulsing algorithm in an ex-vivo bovine liver. Int J Hyperthermia 2019; 36:81-88. [DOI: 10.1080/02656736.2019.1617901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Eliel Ben-David
- Department of Radiology, Shaare Zedek Medical Center, Jerusalem, Israel
| | - Isaac Nissenbaum
- Department of Radiology, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Svetlana Gurevich
- Department of Radiology, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | | | - S. Nahum Goldberg
- Department of Radiology, Hadassah Hebrew University Medical Center, Jerusalem, Israel
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Abstract
Over the past decade, interventional oncology techniques have become integrated into the treatment plans of companion animals with cancer on a regular basis. Although procedures such as stenting are performed commonly, other less frequently utilized techniques for locoregional therapy, such as embolization and ablation, are emerging and demonstrating promise. Tumor ablation techniques are categorized into two subgroups: chemical ablation and energy-based ablation. Increased utilization of ablation will allow for the determination of specific indications and evaluation of outcomes for these techniques.
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Loriaud A, Denys A, Seror O, Vietti Violi N, Digklia A, Duran R, Trillaud H, Hocquelet A. Hepatocellular carcinoma abutting large vessels: comparison of four percutaneous ablation systems. Int J Hyperthermia 2018; 34:1171-1178. [PMID: 29457510 DOI: 10.1080/02656736.2018.1440017] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
PURPOSE To compare overall local tumour progression (OLTP), defined as the failure of primary ablation or local tumour progression, with single applicator monopolar radiofrequency ablation (RFA), microwave ablation (MWA), cluster-RFA and multi-bipolar radiofrequency (mbpRFA) in the treatment of hepatocellular carcinoma (HCC) ≤ 5 cm abutting large vessels (≥3 mm). MATERIALS AND METHODS This multicenter, retrospective, per-nodule study was performed from 2007 to 2015. The study was approved by the ethics review board, and informed consent was waived. A total of 160/914 HCC nodules treated by thermal ablation and abutting large vessels (40 per treatment group) treated by monopolar RFA, MWA, cluster-RFA or mbpRFA were matched for tumour size, alpha-feto-protein level and vessel size. OLTP rates were compared by the log-rank test and the multivariate Cox model after matching. RESULTS No differences were observed in tumour size, vessel size or alpha-feto-protein levels among the three groups (p = 1). The cumulative 4-year OLTP rates following monopolar RFA, cluster-RFA, multi-bipolar RFA and MWA were 50.5%, 16.3%, 16.3% and 44.2%, respectively (p = 0.036). On multivariate Cox regression, vessel size ≥10 mm, monopolar RFA and MWA were independent risk factors of OLTP compared to cluster-RFA or mbpRFA. CONCLUSION Multi-applicator RFA provides better local tumour control in HCC abutting large vessels than single-applicator techniques (monopolar RFA or MWA).
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Affiliation(s)
- Amélie Loriaud
- a Department of Diagnostic and Interventional Radiology , Hopital Saint-André, Centre Hospitalier Universitaire de Bordeaux , Bordeaux , France
| | - Alban Denys
- b Department of Radiodiagnostic and Interventional Radiology , Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne , Lausanne , Switzerland
| | - Olivier Seror
- c Department of Radiology , Hôpital Jean Verdier (Assistance Publique-Hôpitaux de Paris) , Bondy , France
| | - Naik Vietti Violi
- b Department of Radiodiagnostic and Interventional Radiology , Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne , Lausanne , Switzerland
| | - Antonia Digklia
- b Department of Radiodiagnostic and Interventional Radiology , Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne , Lausanne , Switzerland
| | - Rafael Duran
- b Department of Radiodiagnostic and Interventional Radiology , Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne , Lausanne , Switzerland
| | - Hervé Trillaud
- a Department of Diagnostic and Interventional Radiology , Hopital Saint-André, Centre Hospitalier Universitaire de Bordeaux , Bordeaux , France.,d EA IMOTION (Imagerie moléculaire et thérapies innovantes en oncologie) , Université de Bordeaux , Bordeaux , France
| | - Arnaud Hocquelet
- b Department of Radiodiagnostic and Interventional Radiology , Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne , Lausanne , Switzerland.,d EA IMOTION (Imagerie moléculaire et thérapies innovantes en oncologie) , Université de Bordeaux , Bordeaux , France
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Chang W, Lee JM, Lee DH, Yoon JH, Kim YJ, Yoon JH, Han JK. Comparison of switching bipolar ablation with multiple cooled wet electrodes and switching monopolar ablation with separable clustered electrode in treatment of small hepatocellular carcinoma: A randomized controlled trial. PLoS One 2018; 13:e0192173. [PMID: 29420589 PMCID: PMC5805261 DOI: 10.1371/journal.pone.0192173] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 01/16/2018] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE A randomized controlled trial was conducted to prospectively compare the therapeutic effectiveness of switching bipolar (SB) radiofrequency ablation (RFA) using cooled-wet electrodes and switching monopolar (SM) RFA using separable clustered (SC) electrodes in patients with hepatocellular carcinomas (HCCs). MATERIALS AND METHODS This prospective study was approved by our Institutional Review Board. Between April 2014 and January 2015, sixty-nine patients with 74 HCCs were randomly treated with RFA using either internally cooled-wet (ICW) electrodes in SB mode (SB-RFA, n = 36) or SC electrodes in SM mode (SM-RFA, n = 38). Technical parameters including the number of ablations, ablation time, volume, energy delivery, and complications were evaluated. Thereafter, 1-year and 2-year local tumor progression (LTP) free survival rates were compared between the two groups using the Kaplan-Meier method. RESULTS In the SB-RFA group, less number of ablations were required (1.72±0.70 vs. 2.31±1.37, P = 0.039), the ablation time was shorter (10.9±3.9 vs.14.3±5.0 min, p = 0.004), and energy delivery was smaller (13.1±6.3 vs.23.4±12.8 kcal, p<0.001) compared to SM-RFA. Ablation volume was not significantly different between SB-RFA and SM-RFA groups (61.8±24.3 vs.54.9±23.7 cm3, p = 0.229). Technical failure occurred in one patient in the SM-RFA group, and major complications occurred in one patient in each group. The 1-year and 2-year LTP free survival rates were 93.9% and 84.3% in the SB-RFA group and 94.4% and 88.4% in the SM-RFA group (p = 0.687). CONCLUSION Both SB-RFA using ICW electrodes and SM-RFA using SC electrodes provided comparable LTP free survival rates although SB-RFA required less ablations and shorter ablation time.
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Affiliation(s)
- Won Chang
- Department of Radiology, Seoul National University Bundang Hospital, 82, Gumi-ro 173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
| | - Jeong Min Lee
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul, Korea
- Seoul National University College of Medicine, Jongno-gu, Seou, Korea
- * E-mail:
| | - Dong Ho Lee
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul, Korea
| | - Jeong Hee Yoon
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul, Korea
| | - Yoon Jun Kim
- Seoul National University College of Medicine, Jongno-gu, Seou, Korea
- Department of Internal Medicine, Seoul National University Hospital, Jongno-gu, Seoul, Korea
| | - Jung Hwan Yoon
- Seoul National University College of Medicine, Jongno-gu, Seou, Korea
- Department of Internal Medicine, Seoul National University Hospital, Jongno-gu, Seoul, Korea
| | - Joon Koo Han
- Department of Radiology, Seoul National University Hospital, Jongno-gu, Seoul, Korea
- Seoul National University College of Medicine, Jongno-gu, Seou, Korea
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Tan Y, Jiang J, Wang Q, Guo S, Ma K, Bie P. Radiofrequency ablation using a multiple-electrode switching system for hepatocellular carcinoma within the Milan criteria: long-term results. Int J Hyperthermia 2017; 34:298-305. [PMID: 28554226 DOI: 10.1080/02656736.2017.1330495] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- Yunhua Tan
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Jiayun Jiang
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Qiang Wang
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Shixiang Guo
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Kuansheng Ma
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Ping Bie
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chongqing, P.R. China
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Chang W, Lee JM, Yoon JH, Lee DH, Lee SM, Lee KB, Kim BR, Kim TH, Lee S, Han JK. No-touch radiofrequency ablation using multiple electrodes: An in vivo comparison study of switching monopolar versus switching bipolar modes in porcine livers. PLoS One 2017; 12:e0176350. [PMID: 28445542 PMCID: PMC5405985 DOI: 10.1371/journal.pone.0176350] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 04/10/2017] [Indexed: 12/12/2022] Open
Abstract
Objective To evaluate the in vivo technical feasibility, efficiency, and safety of switching bipolar (SB) and switching monopolar (SM) radiofrequency ablation (RFA) as a no-touch ablation technique in the porcine liver. Materials and methods The animal care and use committee approved this animal study and 16 pigs were used in two independent experiments. In the first experiment, RFA was performed on 2-cm tumor mimickers in the liver using a no-touch technique in the SM mode (2 groups, SM1: 10 minutes, n = 10; SM2: 15 minutes, n = 10) and SB-mode (1 group, SB: 10 minutes, n = 10). The technical success with sufficient safety margins, creation of confluent necrosis, ablation size, and distance between the electrode and ablation zone margin (DEM), were compared between groups. In the second experiment, thermal injury to the adjacent anatomic organs was compared between SM-RFA (15 minutes, n = 13) and SB-RFA modes (10 minutes, n = 13). Results The rates of the technical success and the creation of confluent necrosis were higher in the SB group than in the SM1 groups (100% vs. 60% and 90% vs. 40%, both p < 0.05). The ablation volume in the SM2 group was significantly larger than that in the SB group (59.2±18.7 cm3 vs. 39.8±9.7 cm3,p < 0.05), and the DEM in the SM2 group was also larger than that in the SB group (1.39±0.21 cm vs. 1.07±0.10 cm, p < 0.05). In the second experiment, the incidence of thermal injury to the adjacent organs and tissues in the SB group (23.1%, 3/13) was significantly lower than that in the SM group (69.2%, 8/13) (p = 0.021). Conclusion SB-RFA was more advantageous for a no-touch technique for liver tumors, showing the potential of a better safety profile than SM-RFA.
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Affiliation(s)
- Won Chang
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
| | - Jeong Min Lee
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
- Institute of Radiation Medicine, Seoul National University Medical Research Center, 103 Daehak-ro, Jongno-gu, Seoul, Korea
- * E-mail:
| | - Jeong Hee Yoon
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
| | - Dong Ho Lee
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
| | - Sang Min Lee
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
| | - Kyoung Bun Lee
- Department of Pathology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
| | - Bo Ram Kim
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
| | - Tae-Hyung Kim
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
| | - Seunghyun Lee
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
| | - Joon Koo Han
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Korea
- Institute of Radiation Medicine, Seoul National University Medical Research Center, 103 Daehak-ro, Jongno-gu, Seoul, Korea
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Chang W, Lee JM, Lee SM, Han JK. No-Touch Radiofrequency Ablation: A Comparison of Switching Bipolar and Switching Monopolar Ablation in Ex Vivo Bovine Liver. Korean J Radiol 2017; 18:279-288. [PMID: 28246508 PMCID: PMC5313516 DOI: 10.3348/kjr.2017.18.2.279] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 10/12/2016] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE To evaluate the feasibility, efficiency, and safety of no-touch switching bipolar (SB) and switching monopolar (SM) radiofrequency ablation (RFA) using ex vivo bovine livers. MATERIALS AND METHODS A pork loin cube was inserted as a tumor mimicker in the bovine liver block; RFA was performed using the no-touch technique in the SM (group A1; 10 minutes, n = 10, group A2; 15 minutes, n = 10) and SB (group B; 10 minutes, n = 10) modes. The groups were compared based on the creation of confluent necrosis with sufficient safety margins, the dimensions, and distance between the electrode and ablation zone margin (DEM). To evaluate safety, small bowel loops were placed above the liver surface and 30 additional ablations were performed in the same groups. RESULTS Confluent necroses with sufficient safety margins were created in all specimens. SM RFA created significantly larger volumes of ablation compared to SB RFA (all p < 0.001). The DEM of group B was significantly lower than those of groups A1 and A2 (all p < 0.001). Although thermal injury to the small bowel was noted in 90%, 100%, and 30% of the cases in groups A1, A2, and B, respectively, full depth injury was noted only in 60% of group A2 cases. CONCLUSION The no-touch RFA technique is feasible in both the SB and SM modes; however, SB RFA appears to be more advantageous compared to SM RFA in the creation of an ablation zone while avoiding the unnecessary creation of an adjacent parenchymal ablation zone or adjacent small bowel injuries.
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Affiliation(s)
- Won Chang
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
| | - Jeong Min Lee
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea.; Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul 03080, Korea
| | - Sang Min Lee
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea
| | - Joon Koo Han
- Department of Radiology, Seoul National University Hospital, Seoul 03080, Korea.; Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul 03080, Korea
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Ahmad MIM. Radiofrequency ablation with monopolar cluster versus bipolar multipolar electrodes for the ablation of ⩾2.5cm hepatocellular carcinoma. THE EGYPTIAN JOURNAL OF RADIOLOGY AND NUCLEAR MEDICINE 2016. [DOI: 10.1016/j.ejrnm.2016.08.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Switching Monopolar Radiofrequency Ablation Using a Separable Cluster Electrode in Patients with Hepatocellular Carcinoma: A Prospective Study. PLoS One 2016; 11:e0161980. [PMID: 27575787 PMCID: PMC5004876 DOI: 10.1371/journal.pone.0161980] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 08/03/2016] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE This study was conducted to evaluate the outcomes of multi-channel switching RFA using a separable cluster electrode in patients with HCC. METHODS From November 2011 to July 2013, 79 patients with 98 HCCs < 5 cm were enrolled and treated with RFA using a multi-channel switching radiofrequency system and a separable cluster electrode under the guidance of a real-time fusion imaging system. The primary and secondary endpoints were the 3-year local tumor progression (LTP) rate and recurrence-free survival (RFS) rate, respectively. For post hoc analyses, LTP, RFS, and major complication rates were retrospectively compared with a historical control group treated with RFA using the same radiofrequency system but with multiple internally-cooled electrodes. RESULTS The technique success rate of the 98 tumors was 100%. Cumulative 1-year, 2-year, and 3-year LTP rates were 3.4%, 6.9%, and 12.4%, respectively. For patient-level data, cumulative 1-year, 2-year, and 3-year RFS rates were 83.9%, 68.6%, and 45.4%, respectively. On post hoc analyses, none of the baseline characteristics showed a significant difference between the separable cluster electrode and multiple internally-cooled electrodes group. Cumulative LTP and RFS rates of the two groups also showed no significant difference (p = 0.401 and p = 0.881, respectively). Finally, major complication rates of the separable cluster electrode group (5.0%, 4/79) and multiple internally-cooled electrodes group (5.9%, 4/74) were also comparable (p = 1.000). CONCLUSION Switching monopolar RFA using a separable cluster electrode is a feasible and efficient technique for the treatment of HCCs smaller than 5 cm, providing comparable local tumor control to multiple internally-cooled electrodes. TRIAL REGISTRATION ClinicalTrials.gov NCT02745483.
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Nakatsuka A, Yamakado K, Uraki J, Takaki H, Yamanaka T, Fujimori M, Hasegawa T, Sakuma H. Safety and Clinical Outcomes of Percutaneous Radiofrequency Ablation for Intermediate and Large Bone Tumors Using a Multiple-Electrode Switching System: A Phase II Clinical Study. J Vasc Interv Radiol 2016; 27:388-94. [DOI: 10.1016/j.jvir.2015.10.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 10/02/2015] [Accepted: 10/25/2015] [Indexed: 11/28/2022] Open
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Lin CC, Cheng YT, Chen M WT, Lin SM. The Effectiveness of Multiple Electrode Radiofrequency Ablation in Patients with Hepatocellular Carcinoma with Lesions More than 3 cm in Size and Barcelona Clinic Liver Cancer Stage A to B2. Liver Cancer 2016; 5:8-20. [PMID: 26989656 PMCID: PMC4789949 DOI: 10.1159/000367755] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Outcomes of hepatocellular carcinoma (HCC) lesions >3.0 cm in size including Barcelona Clinic Liver Cancer (BCLC) stage B after radiofrequency ablation (RFA) with a single electrode remain unsatisfactory. This study aimed to investigate the outcomes of RFA with multiple electrodes (ME-RFA) for HCC tumors 3.1-7.0 cm in size and BCLC stage B. This retrospective study included 70 consecutive patients with 58 medium- (3.1-5.0 cm) and 17 large- (5.1-7.0 cm) sized HCCs after ME-RFA using a controller. Outcomes in terms of complete response, primary technique effectiveness, local tumor progression, and overall survival were investigated. After 1-4 applications of ME-RFA, the rates of complete response and PTE in medium-sized tumors were 79.3% and 91.4%, respectively, and in large tumors were 76.5% and 94.1%, respectively. Overall, the major complication rate was 5.7%. After a median 21-month follow-up period, both two- and three-year estimated overall survival rates were above 80%. There were no significant differences in overall survival and local tumor progression rates between medium- and large-size tumors and among BCLC stages A, B1 and B2. A complete response to ME-RFA was the only significant factor associated with improved survival (p=0.008). In conclusion, ME-RFA can effectively treat 3.1-7.0-cm sized HCCs with a comparable outcome between medium- and large-size tumors and among BCLA stages A to B2.
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Affiliation(s)
| | | | | | - Shi-Ming Lin
- *Shi-Ming Lin, MD, Division of Hepatology, Liver Research Unit, Department of Gastroenterology, and Hepatology, Chang Gung Memorial Hospital, Lin-Kuo, Chang Gung University, 5, Fu-Hsin St., Kwei-Shan, Taoyuan, Taiwan 333 (ROC), Tel. 886 3 3281200 Ext. 8107, E-Mail
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Hinshaw JL, Lubner MG, Ziemlewicz TJ, Lee FT, Brace CL. Percutaneous tumor ablation tools: microwave, radiofrequency, or cryoablation--what should you use and why? Radiographics 2015; 10:47-57. [PMID: 25208284 DOI: 10.1053/j.tvir.2007.08.005] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Image-guided thermal ablation is an evolving and growing treatment option for patients with malignant disease of multiple organ systems. Treatment indications have been expanding to include benign tumors as well. Specifically, the most prevalent indications to date have been in the liver (primary and metastatic disease, as well as benign tumors such as hemangiomas and adenomas), kidney (primarily renal cell carcinoma, but also benign tumors such as angiomyolipomas and oncocytomas), lung (primary and metastatic disease), and soft tissue and/or bone (primarily metastatic disease and osteoid osteomas). Each organ system has different underlying tissue characteristics, which can have profound effects on the resulting thermal changes and ablation zone. Understanding these issues is important for optimizing clinical results. In addition, thermal ablation technology has evolved rapidly during the past several decades, with substantial technical and procedural improvements that can help improve clinical outcomes and safety profiles. Staying up to date on these developments is challenging but critical because the physical properties underlying the different ablation modalities and the appropriate use of adjuncts will have a tremendous effect on treatment results. Ultimately, combining an understanding of the physical properties of the ablation modalities with an understanding of the thermal kinetics in tissue and using the most appropriate ablation modality for each patient are key to optimizing clinical outcomes. Suggested algorithms are described that will help physicians choose among the various ablation modalities for individual patients.
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Affiliation(s)
- J Louis Hinshaw
- From the Departments of Radiology (J.L.H., M.G.L., T.J.Z., F.T.L., C.L.B.), Biomedical Engineering (C.L.B.), and Medical Physics (C.L.B.), University of Wisconsin, 600 Highland Ave, E3 366, Madison, WI 53792-3252
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Hinshaw JL, Lubner MG, Ziemlewicz TJ, Lee FT, Brace CL. Percutaneous tumor ablation tools: microwave, radiofrequency, or cryoablation--what should you use and why? Radiographics 2015; 34:1344-62. [PMID: 25208284 DOI: 10.1148/rg.345140054] [Citation(s) in RCA: 202] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Image-guided thermal ablation is an evolving and growing treatment option for patients with malignant disease of multiple organ systems. Treatment indications have been expanding to include benign tumors as well. Specifically, the most prevalent indications to date have been in the liver (primary and metastatic disease, as well as benign tumors such as hemangiomas and adenomas), kidney (primarily renal cell carcinoma, but also benign tumors such as angiomyolipomas and oncocytomas), lung (primary and metastatic disease), and soft tissue and/or bone (primarily metastatic disease and osteoid osteomas). Each organ system has different underlying tissue characteristics, which can have profound effects on the resulting thermal changes and ablation zone. Understanding these issues is important for optimizing clinical results. In addition, thermal ablation technology has evolved rapidly during the past several decades, with substantial technical and procedural improvements that can help improve clinical outcomes and safety profiles. Staying up to date on these developments is challenging but critical because the physical properties underlying the different ablation modalities and the appropriate use of adjuncts will have a tremendous effect on treatment results. Ultimately, combining an understanding of the physical properties of the ablation modalities with an understanding of the thermal kinetics in tissue and using the most appropriate ablation modality for each patient are key to optimizing clinical outcomes. Suggested algorithms are described that will help physicians choose among the various ablation modalities for individual patients.
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Affiliation(s)
- J Louis Hinshaw
- From the Departments of Radiology (J.L.H., M.G.L., T.J.Z., F.T.L., C.L.B.), Biomedical Engineering (C.L.B.), and Medical Physics (C.L.B.), University of Wisconsin, 600 Highland Ave, E3 366, Madison, WI 53792-3252
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Abstract
Although a surgical procedure is performed by visual inspection with histopathological assessment of the excised tumor and margins, percutaneous and noninvasive thermal ablation is performed strictly with the aid of imaging. Applicator guidance into the target zone, treatment monitoring and verification, and clinical follow-up rely on effective imaging. Detailed discussion of imaging is beyond the scope of this article, but the influence of imaging on the choice of thermal ablation or procedural approach will be discussed as needed. More information on imaging for interventional therapies can be found in other articles in this issue of IEEE Pulse.
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Mulier S, Jiang Y, Jamart J, Wang C, Feng Y, Marchal G, Michel L, Ni Y. Bipolar radiofrequency ablation with 2 × 2 electrodes as a building block for matrix radiofrequency ablation:Ex vivoliver experiments and finite element method modelling. Int J Hyperthermia 2015; 31:649-65. [DOI: 10.3109/02656736.2015.1046194] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Kodama H, Yamakado K, Hasegawa T, Fujimori M, Yamanaka T, Takaki H, Uraki J, Nakatsuka A, Sakuma H. Radiofrequency Ablation Using a Multiple-Electrode Switching System for Lung Tumors with 2.0-5.0-cm Maximum Diameter: Phase II Clinical Study. Radiology 2015; 277:895-902. [PMID: 26053308 DOI: 10.1148/radiol.2015141153] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
PURPOSE To prospectively evaluate the safety and effectiveness of radiofrequency ablation (RFA) by using a multiple-electrode switching system to treat 2.0-5.0-cm lung tumors. MATERIALS AND METHODS The institutional review board approved this prospective phase II study. Written informed consent was obtained from all patients. Between September 2009 and July 2011, RFA using two or three radiofrequency (RF) electrodes and a multiple-electrode switching system was performed for malignant lung tumors with a maximum tumor diameter of 2.0-5.0 cm in nonsurgical candidates. The primary endpoint was safety, as evaluated using the Common Terminology Criteria for Adverse Events. Patients were observed for at least 1 year. Local tumor progression and overall survival were analyzed with the Kaplan-Meier method. RESULTS Thirty-three patients (26 men, seven women; mean age, 70.5 years ± 10.0; age range, 46-87 years) with 35 lung tumors with a mean maximum diameter of 3.0 cm ± 0.7 (standard deviation; range, 2.0-4.4 cm) underwent treatment in 35 sessions. No procedure-related death or grade 4 adverse events (AEs) occurred. Grade 3 AEs occurred in four patients (12%), with pleural effusion requiring chest tube placement in two patients, pneumothorax requiring pleural adhesion in one patient, and pulmonary hemorrhage requiring pulmonary artery coil embolization in one patient. Grade 2 AEs were detected in 13 patients (39%). The 1-year local tumor progression and overall survival rates were 12.7% (95% confidence interval [CI]: 1.0, 25.5) and 81.2% (95% CI: 67.6, 94.8). CONCLUSION RFA with a multiple-electrode switching system may be a safe therapeutic option with which to treat 2.0-5.0-cm lung cancer tumors.
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Affiliation(s)
- Hiroshi Kodama
- From the Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Koichiro Yamakado
- From the Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Takaaki Hasegawa
- From the Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Masashi Fujimori
- From the Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Takashi Yamanaka
- From the Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Haruyuki Takaki
- From the Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Junji Uraki
- From the Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Atsuhiro Nakatsuka
- From the Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Hajime Sakuma
- From the Department of Radiology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
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Martins GLP, Bernardes JPG, Rovella MS, Andrade RG, Viana PCC, Herman P, Cerri GG, Menezes MR. Radiofrequency ablation for treatment of hypersplenism: A feasible therapeutic option. World J Gastroenterol 2015; 21:6391-6397. [PMID: 26034376 PMCID: PMC4445118 DOI: 10.3748/wjg.v21.i20.6391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 12/06/2014] [Accepted: 02/05/2015] [Indexed: 02/06/2023] Open
Abstract
We present a case of a patient with hypersplenism secondary to portal hypertension due to hepato-splenic schistosomiasis, which was accompanied by severe and refractory thrombocytopenia. We performed spleen ablation and measured the total spleen and ablated volumes with contrast-enhanced computed tomography and volumetry. No major complications occurred, thrombocytopenia was resolved, and platelet levels remained stable, which allowed for early treatment of the patient’s underlying disease. Previous work has shown that splenic radiofrequency ablation is an attractive alternative treatment for hypersplenism induced by liver cirrhosis. We aimed to contribute to the currently sparse literature evaluating the role of radiofrequency ablation (RFA) in the management of hypersplenism. We conclude that splenic RFA appears to be a viable and promising option for the treatment of hypersplenism.
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Yoon JH, Lee JM, Woo S, Hwang EJ, Hwang I, Choi W, Han JK, Choi BI. Switching bipolar hepatic radiofrequency ablation using internally cooled wet electrodes: comparison with consecutive monopolar and switching monopolar modes. Br J Radiol 2015; 88:20140468. [PMID: 25873479 DOI: 10.1259/bjr.20140468] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVE To evaluate whether switching bipolar radiofrequency ablation (SB-RFA) using three internally cooled wet (ICW) electrodes can induce coagulations >5 cm in porcine livers with better efficiency than consecutive monopolar (CM) or switching monopolar (SM) modes. METHODS A total of 60 coagulations were made in 15 in vivo porcine livers using three 17-gauge ICW electrodes and a multichannel radiofrequency (RF) generator. RF energy (approximately 200 W) was applied in CM mode (Group A, n = 20) for 24 min, SM mode for 12 min (Group B, n = 20) or switching bipolar (SB) mode for 12 min (Group C, n = 20) in in vivo porcine livers. Thereafter, the delivered RFA energy, as well as the shape and dimension of coagulations were compared among the groups. RESULTS Spherical- or oval-shaped ablations were created in 30% (6/20), 85% (17/20) and 90% (18/20) of coagulations in the CM, SM and SB groups, respectively (p = 0.003). SB-RFA created ablations >5 cm in minimum diameter (Dmin) in 65% (13/20) of porcine livers, whereas SM- or CM-RFA created ablations >5 cm in only 25% (5/20) and 20% (4/20) of porcine livers, respectively (p = 0.03). The mean Dmin of coagulations was significantly larger in Group C than in Groups A and B (5.1 ± 0.9, 3.9 ± 1.2 and 4.4 ± 1.0 cm, respectively, p = 0.002) at a lower delivered RF energy level (76.8 ± 14.3, 120.9 ± 24.5 and 114.2 ± 18.3 kJ, respectively, p < 0.001). CONCLUSION SB-RFA using three ICW electrodes can create coagulations >5 cm in diameter with better efficiency than do SM- or CM-RFA. ADVANCES IN KNOWLEDGE SB-RFA can create large, regular ablation zones with better time-energy efficiency than do CM- or SM-RFA.
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Affiliation(s)
- J H Yoon
- 1 Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
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Ahmed M, Solbiati L, Brace CL, Breen DJ, Callstrom MR, Charboneau JW, Chen MH, Choi BI, de Baère T, Dodd GD, Dupuy DE, Gervais DA, Gianfelice D, Gillams AR, Lee FT, Leen E, Lencioni R, Littrup PJ, Livraghi T, Lu DS, McGahan JP, Meloni MF, Nikolic B, Pereira PL, Liang P, Rhim H, Rose SC, Salem R, Sofocleous CT, Solomon SB, Soulen MC, Tanaka M, Vogl TJ, Wood BJ, Goldberg SN. Image-guided tumor ablation: standardization of terminology and reporting criteria--a 10-year update. J Vasc Interv Radiol 2014; 25:1691-705.e4. [PMID: 25442132 PMCID: PMC7660986 DOI: 10.1016/j.jvir.2014.08.027] [Citation(s) in RCA: 346] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2013] [Revised: 02/11/2014] [Accepted: 03/26/2014] [Indexed: 12/12/2022] Open
Abstract
Image-guided tumor ablation has become a well-established hallmark of local cancer therapy. The breadth of options available in this growing field increases the need for standardization of terminology and reporting criteria to facilitate effective communication of ideas and appropriate comparison among treatments that use different technologies, such as chemical (eg, ethanol or acetic acid) ablation, thermal therapies (eg, radiofrequency, laser, microwave, focused ultrasound, and cryoablation) and newer ablative modalities such as irreversible electroporation. This updated consensus document provides a framework that will facilitate the clearest communication among investigators regarding ablative technologies. An appropriate vehicle is proposed for reporting the various aspects of image-guided ablation therapy including classification of therapies, procedure terms, descriptors of imaging guidance, and terminology for imaging and pathologic findings. Methods are addressed for standardizing reporting of technique, follow-up, complications, and clinical results. As noted in the original document from 2003, adherence to the recommendations will improve the precision of communications in this field, leading to more accurate comparison of technologies and results, and ultimately to improved patient outcomes.
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Affiliation(s)
- Muneeb Ahmed
- Department of Radiology, Beth Israel Deaconess Medical Center 1 Deaconess Rd, WCC-308B, Boston, MA 02215.
| | - Luigi Solbiati
- Department of Radiology, Ospedale Generale, Busto Arsizio, Italy
| | - Christopher L Brace
- Departments of Radiology, Biomedical Engineering, and Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - David J Breen
- Department of Radiology, Southampton University Hospitals, Southampton, England
| | | | | | - Min-Hua Chen
- Department of Ultrasound, School of Oncology, Peking University, Beijing, China
| | - Byung Ihn Choi
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
| | - Thierry de Baère
- Department of Imaging, Institut de Cancérologie Gustave Roussy, Villejuif, France
| | - Gerald D Dodd
- Department of Radiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Damian E Dupuy
- Department of Diagnostic Radiology, Rhode Island Hospital, Providence, Rhode Island
| | - Debra A Gervais
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - David Gianfelice
- Medical Imaging, University Health Network, Laval, Quebec, Canada
| | | | - Fred T Lee
- Department of Radiology, University of Wisconsin Hospital and Clinics, Madison, Wisconsin
| | - Edward Leen
- Department of Radiology, Royal Infirmary, Glasgow, Scotland
| | - Riccardo Lencioni
- Department of Diagnostic Imaging and Intervention, Cisanello Hospital, Pisa University Hospital and School of Medicine, University of Pisa, Pisa, Italy
| | - Peter J Littrup
- Department of Radiology, Karmonos Cancer Institute, Wayne State University, Detroit, Michigan
| | | | - David S Lu
- Department of Radiology, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - John P McGahan
- Department of Radiology, Ambulatory Care Center, UC Davis Medical Center, Sacramento, California
| | | | - Boris Nikolic
- Department of Radiology, Albert Einstein Medical Center, Philadelphia, Pennsylvania
| | - Philippe L Pereira
- Clinic of Radiology, Minimally-Invasive Therapies and Nuclear Medicine, Academic Hospital Ruprecht-Karls-University Heidelberg, Heilbronn, Germany
| | - Ping Liang
- Department of Interventional Ultrasound, Chinese PLA General Hospital, Beijing, China
| | - Hyunchul Rhim
- Department of Diagnostic Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Steven C Rose
- Department of Radiology, University of California, San Diego, San Diego, California
| | - Riad Salem
- Department of Radiology, Northwestern University, Chicago, Illinois
| | | | - Stephen B Solomon
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Michael C Soulen
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | | | - Thomas J Vogl
- Institute for Diagnostic and Interventional Radiology, University Hospital Frankfurt, Johann Wolfgang Goethe-University, Frankfurt, Germany
| | - Bradford J Wood
- Radiology and Imaging Science, National Institutes of Health, Bethesda, Maryland
| | - S Nahum Goldberg
- Department of Radiology, Image-Guided Therapy and Interventional Oncology Unit, Hadassah Hebrew University Medical Center, Jerusalem, Israel
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Costanzo GGD, Francica G, Pacella CM. Laser ablation for small hepatocellular carcinoma: State of the art and future perspectives. World J Hepatol 2014; 6:704-715. [PMID: 25349642 PMCID: PMC4209416 DOI: 10.4254/wjh.v6.i10.704] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 06/17/2014] [Accepted: 07/29/2014] [Indexed: 02/06/2023] Open
Abstract
During the last two decades, various local thermal ablative techniques for the treatment of unresectable hepatocellular carcinoma (HCC) have been developed. According to internationally endorsed guidelines, percutaneous thermal ablation is the mainstay of treatment in patients with small HCC who are not candidates for surgical resection or transplantation. Laser ablation (LA) represents one of currently available loco-ablative techniques. In this article, the general principles, technique, image guidance, and patient selection are reported. Primary effectiveness, long-term outcome, and complications are also discussed. A review of published data suggests that LA is equivalent to the more popular and widespread radiofrequency ablation in both local tumor control and long-term outcome in the percutaneous treatment of early HCC. In addition, the LA technique using multiple thin laser fibres allows improved ablative effectiveness in HCCs greater than 3 cm. Reference centres should be equipped with all the available techniques so as to be able to use the best and the most suitable procedure for each type of lesion for each patient.
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Abstract
Tumor ablation is a minimally invasive technique that is commonly used in the treatment of tumors of the liver, kidney, bone, and lung. During tumor ablation, thermal energy is used to heat or cool tissue to cytotoxic levels (less than -40°C or more than 60°C). An additional technique is being developed that targets the permeability of the cell membrane and is ostensibly nonthermal. Within the classification of tumor ablation, there are several modalities used worldwide: radiofrequency, microwave, laser, high-intensity focused ultrasound, cryoablation, and irreversible electroporation. Each technique, although similar in purpose, has specific and optimal indications. This review serves to discuss general principles and technique, reviews each modality, and discusses modality selection.
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Affiliation(s)
- Erica M Knavel
- Department of Radiology, University of Wisconsin Madison, Clinical Sciences Center, Madison, WI.
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Ahmed M, Solbiati L, Brace CL, Breen DJ, Callstrom MR, Charboneau JW, Chen MH, Choi BI, de Baère T, Dodd GD, Dupuy DE, Gervais DA, Gianfelice D, Gillams AR, Lee FT, Leen E, Lencioni R, Littrup PJ, Livraghi T, Lu DS, McGahan JP, Meloni MF, Nikolic B, Pereira PL, Liang P, Rhim H, Rose SC, Salem R, Sofocleous CT, Solomon SB, Soulen MC, Tanaka M, Vogl TJ, Wood BJ, Goldberg SN. Image-guided tumor ablation: standardization of terminology and reporting criteria--a 10-year update. Radiology 2014; 273:241-60. [PMID: 24927329 DOI: 10.1148/radiol.14132958] [Citation(s) in RCA: 822] [Impact Index Per Article: 82.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Image-guided tumor ablation has become a well-established hallmark of local cancer therapy. The breadth of options available in this growing field increases the need for standardization of terminology and reporting criteria to facilitate effective communication of ideas and appropriate comparison among treatments that use different technologies, such as chemical (eg, ethanol or acetic acid) ablation, thermal therapies (eg, radiofrequency, laser, microwave, focused ultrasound, and cryoablation) and newer ablative modalities such as irreversible electroporation. This updated consensus document provides a framework that will facilitate the clearest communication among investigators regarding ablative technologies. An appropriate vehicle is proposed for reporting the various aspects of image-guided ablation therapy including classification of therapies, procedure terms, descriptors of imaging guidance, and terminology for imaging and pathologic findings. Methods are addressed for standardizing reporting of technique, follow-up, complications, and clinical results. As noted in the original document from 2003, adherence to the recommendations will improve the precision of communications in this field, leading to more accurate comparison of technologies and results, and ultimately to improved patient outcomes. Online supplemental material is available for this article .
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Affiliation(s)
- Muneeb Ahmed
- Department of Radiology, Beth Israel Deaconess Medical Center 1 Deaconess Rd, WCC-308B, Boston, MA 02215 (M.A.); Department of Radiology, Ospedale Generale, Busto Arsizio, Italy (L.S.); Departments of Radiology, Biomedical Engineering, and Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wis (C.L.B.); Department of Radiology, Southampton University Hospitals, Southampton, England (D.J.B.); Department of Radiology, Mayo Clinic, Rochester, Minn (M.R.C., J.W.C.); Department of Ultrasound, School of Oncology, Peking University, Beijing, China (M.H.C.); Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea (B.I.C.); Department of Imaging, Institut de Cancérologie Gustave Roussy, Villejuif, France (T.d.B.); Department of Radiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colo (G.D.D.); Department of Diagnostic Radiology, Rhode Island Hospital, Providence, RI (D.E.D.); Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Mass (D.A.G.); Medical Imaging, University Health Network, Laval, Quebec, Canada (D.G.); Imaging Department, the London Clinic, London, England (A.R.G.); Department of Radiology, University of Wisconsin Hospital and Clinics, Madison, Wis (F.T.L.); Department of Radiology, Royal Infirmary, Glasgow, Scotland (E.L.); Department of Diagnostic Imaging and Intervention, Cisanello Hospital, Pisa University Hospital and School of Medicine, University of Pisa, Pisa, Italy (R.L.); Department of Radiology, Karmonos Cancer Institute, Wayne State University, Detroit, Mich (P.J.L.); Busto Arsizio, Italy (T.L.); Department of Radiology, David Geffen School of Medicine at UCLA, Los Angeles, Calif (D.S.L.); Department of Radiology, Ambulatory Care Center, UC Davis Medical Center, Sacramento, Calif (J.P.M.); Department of Radiology, Ospedale Valduce, Como, Italy (M.F.M.); Department of Radiology, Albert Einstein Medical Center, Phil
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Yoon JH, Lee JM, Hwang EJ, Hwang IP, Baek J, Han JK, Choi BI. Monopolar radiofrequency ablation using a dual-switching system and a separable clustered electrode: evaluation of the in vivo efficiency. Korean J Radiol 2014; 15:235-44. [PMID: 24643383 PMCID: PMC3955790 DOI: 10.3348/kjr.2014.15.2.235] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 01/11/2014] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVE To determine the in vivo efficiency of monopolar radiofrequency ablation (RFA) using a dual-switching (DS) system and a separable clustered (SC) electrode to create coagulation in swine liver. MATERIALS AND METHODS Thirty-three ablation zones were created in nine pigs using a DS system and an SC electrode in the switching monopolar mode. The pigs were divided into two groups for two experiments: 1) preliminary experiments (n = 3) to identify the optimal inter-electrode distances (IEDs) for dual-switching monopolar (DSM)-RFA, and 2) main experiments (n = 6) to compare the in vivo efficiency of DSM-RFA with that of a single-switching monopolar (SSM)-RFA. RF energy was alternatively applied to one of the three electrodes (SSM-RFA) or concurrently applied to a pair of electrodes (DSM-RFA) for 12 minutes in in vivo porcine livers. The delivered RFA energy and the shapes and dimensions of the coagulation areas were compared between the two groups. RESULTS No pig died during RFA. The ideal IEDs for creating round or oval coagulation area using the DSM-RFA were 2.0 and 2.5 cm. DSM-RFA allowed more efficient RF energy delivery than SSM-RFA at the given time (23.0 ± 4.0 kcal vs. 16.92 ± 2.0 kcal, respectively; p = 0.0005). DSM-RFA created a significantly larger coagulation volume than SSM-RFA (40.4 ± 16.4 cm(3) vs. 20.8 ± 10.7 cm(3); p < 0.001). Both groups showed similar circularity of the ablation zones (p = 0.29). CONCLUSION Dual-switching monopolar-radiofrequency ablation using an SC electrode is feasible and can create larger ablation zones than SSM-RFA as it allows more RF energy delivery at a given time.
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Affiliation(s)
- Jeong Hee Yoon
- Department of Radiology, Seoul National University Hospital, Seoul 110-744, Korea
| | - Jeong Min Lee
- Department of Radiology, Seoul National University Hospital, Seoul 110-744, Korea. ; Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul 110-744, Korea
| | - Eui Jin Hwang
- Department of Radiology, Seoul National University Hospital, Seoul 110-744, Korea
| | - In Pyung Hwang
- Department of Radiology, Seoul National University Hospital, Seoul 110-744, Korea
| | - Jeehyun Baek
- Department of Radiology, Seoul National University Hospital, Seoul 110-744, Korea
| | - Joon Koo Han
- Department of Radiology, Seoul National University Hospital, Seoul 110-744, Korea. ; Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul 110-744, Korea
| | - Byung Ihn Choi
- Department of Radiology, Seoul National University Hospital, Seoul 110-744, Korea. ; Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul 110-744, Korea
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Karall D, Scholl-Bürgi S, Widmann G, Albrecht U, Niedermayr K, Maurer K, Ausserer B, Huemer M, Bale R. Stereotactic Radiofrequency Ablation for Liver Tumors in Inherited Metabolic Disorders. Cardiovasc Intervent Radiol 2013; 37:1027-33. [DOI: 10.1007/s00270-013-0756-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 09/21/2013] [Indexed: 02/04/2023]
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Takaki H, Nakatsuka A, Uraki J, Yamanaka T, Fujimori M, Hasegawa T, Arima K, Sugimura Y, Yamakado K. Renal Cell Carcinoma: Radiofrequency Ablation with a Multiple-Electrode Switching System—A Phase II Clinical Study. Radiology 2013; 267:285-92. [DOI: 10.1148/radiol.12121070] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Woo S, Lee JM, Yoon JH, Joo I, Kim SH, Lee JY, Yoon JH, Kim YJ, Han JK, Choi BI. Small- and medium-sized hepatocellular carcinomas: monopolar radiofrequency ablation with a multiple-electrode switching system-mid-term results. Radiology 2013; 268:589-600. [PMID: 23513241 DOI: 10.1148/radiol.13121736] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
PURPOSE To prospectively assess the safety and mid-term therapeutic effectiveness of monopolar radiofrequency (RF) ablation with a multiple-electrode switching system for treating small- and medium-sized (≤ 5 cm) hepatocellular carcinomas (HCCs). MATERIALS AND METHODS The institutional review board approved this prospective study, and all patients gave informed consent. From February 2009 to January 2010, 166 patients (110 men and 56 women; age range, 38-86 years; mean age, 62 years ± 10 [standard deviation]) with 166 HCCs less than or equal to 5 cm in diameter were treated with monopolar RF ablation with a multiple-electrode switching system. One of three experienced radiologists performed the RF ablation. Technique effectiveness, ablation volume and time, and major complications were evaluated by means of computed tomography (CT) immediately after RF ablation and at follow-up CT examinations at 1 month and then every 3 months after the procedure. The overall survival, disease-free survival, and local tumor progression-free survival rates were evaluated by using the Kaplan-Meier method. RESULTS The technique effectiveness rate determined 1 month after RF ablation was 99.4%. Mean ablation parameters were as follows: volume, 85 cm(3) ± 54; maximum diameter, 61 mm ± 13; and minimum diameter, 43 mm ± 11. The major complication rate was 4.8%. The 6-month and 1-, 2-, and 3-year local tumor progression rates were 2%, 6%, 10%, and 11%, respectively. The overall survival rates at 1, 2, and 3 years after RF ablation were 99%, 97%, and 96%, and corresponding local tumor progression-free survival rates were 94%, 90%, and 89%, respectively. The disease-free survival rates at 1, 2, and 3 years after RF ablation were 75%, 60%, and 54%, respectively. CONCLUSION Monopolar RF ablation with a multiple-electrode switching system in small- and medium-sized HCCs was safe and efficient, and it provided successful local tumor control and high local tumor progression-free survival rates because an adequate ablation volume was obtained.
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Affiliation(s)
- Sungmin Woo
- Department of Radiology and Institute of Radiation Medicine, Seoul National University College of Medicine, 28 Yeongon-dong, Jongno-gu, Seoul 110-744, Korea
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Prakash P, Salgaonkar VA, Clif Burdette E, Diederich CJ. Multiple applicator hepatic ablation with interstitial ultrasound devices: theoretical and experimental investigation. Med Phys 2013; 39:7338-49. [PMID: 23231283 DOI: 10.1118/1.4765459] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
PURPOSE To evaluate multiple applicator implant configurations of interstitial ultrasound devices for large volume ablation of liver tumors. METHODS A 3D bioacoustic-thermal model using the finite element method was implemented to assess multiple applicator implant configurations for thermal ablation with interstitial ultrasound energy. Interstitial applicators consist of linear arrays of up to four 10 mm-long tubular ultrasound transducers, each under separate and dynamic power control, enclosed within a water-cooled delivery catheter (2.4 mm OD). The authors considered parallel implants with two and three applicators (clustered configuration), spaced 2-3 cm apart, to simulate open surgical placement. In addition, the authors considered two applicator implants with applicators converging and diverging at angles of ∼20°, 30°, and 45° to simulate percutaneous placement. Heating experiments (10-15 min) were performed and compared against simulations employing the same experimental parameters. To estimate the performance of parallel, multiple applicator configurations in an in vivo setting, simulations were performed taking into account a range of blood perfusion levels (0, 5, 12, and 15 kg m(-3) s(-1)) that may occur in tumors of varying vascularity. The impact of tailoring the power supplied to individual transducer elements along the length of applicators is explored for applicators inserted in non-parallel (converging and diverging) configurations. Thermal dose (t(43) > 240 min) and temperature thresholds (T > 52 °C) were used to define the ablation zones, with dynamic changes to tissue acoustic and thermal properties incorporated within the model. RESULTS Experiments in ex vivo bovine liver yielded ablation zones ranging between 4.0-5.6 cm × 3.2-4.9 cm, in cross section. Ablation zone dimensions predicted by simulations with similar parameters to the experiments were in close agreement (within 5 mm). Simulations of in vivo heating showed that 15 min heating and interapplicator spacing less than 3 cm are required to obtain contiguous, complete ablation zones. The ability to create complete ablation zone profiles for nonparallel implants was illustrated by tailoring applied power levels along the length of applicators. CONCLUSIONS Parallel implants consisting of three interstitial ultrasound applicators in a triangular configuration yield complete ablation zones measuring up to 6.2 cm × 5.7 cm after 15 min heating. At larger interapplicator spacing, the level of blood perfusion in the tumor may yield indentations along the periphery of the ablation zone. Tailoring applied power along the length of the applicator can accommodate for nonparallel implants, without compromising safety.
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Affiliation(s)
- Punit Prakash
- Department of Radiation Oncology, University of California, San Francisco, CA, USA.
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Park MH, Cho JS, Shin BS, Jeon GS, Lee B, Lee K. Comparison of internally cooled wet electrode and hepatic vascular inflow occlusion method for hepatic radiofrequency ablation. Gut Liver 2012; 6:471-5. [PMID: 23170152 PMCID: PMC3493728 DOI: 10.5009/gnl.2012.6.4.471] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Revised: 12/03/2011] [Accepted: 12/30/2011] [Indexed: 01/28/2023] Open
Abstract
Background/Aims Various strategies to expand the ablation zone have been attempted using hepatic radiofrequency ablation (RFA). The optimal strategy, however, is unknown. We compared hepatic RFA with an internally cooled wet (ICW) electrode and vascular inflow occlusion. Methods Eight dogs were assigned to one of three groups: only RFA using an internally cooled electrode (group A), RFA using an ICW electrode (group B), and RFA using an internally cooled electrode with the Pringle maneuver (group C). The ablation zone diameters were measured on the gross specimens, and the volume of the ablation zone was calculated. Results The ablation zone volume was greatest in group B (1.82±1.23 cm3), followed by group C (1.22±0.47 cm3), and then group A (0.48±0.33 cm3). The volumes for group B were significantly larger than the volumes for group A (p=0.030). There was no significant difference in the volumes between groups A and C (p=0.079) and between groups B and C (p=0.827). Conclusions Both the usage of an ICW electrode and hepatic vascular occlusion effectively expanded the ablation zone. The use of an ICW electrode induced a larger ablation zone with easy handling compared with using hepatic vascular occlusion, although this difference was not statistically significant.
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Affiliation(s)
- Mi-Hyun Park
- Department of Radiology, Dankook University Hospital, Dankook University College of Medicine, Cheonan, Korea
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Korutz AW, Sato KT. Radiofrequency ablation of a solitary liver metastasis complicated by colonic perforation. Semin Intervent Radiol 2012; 28:171-4. [PMID: 22654256 DOI: 10.1055/s-0031-1280658] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Radiofrequency ablation is used for the treatment of primary liver malignancies and liver metastases. In this case, the authors performed percutaneous radiofrequency ablation of a solitary esophageal carcinoma metastasis within the left hepatic lobe. Following the procedure, the patient developed a colonic perforation with a large right upper quadrant abscess. Although the abscess nearly resolved after intravenous antibiotics and percutaneous drainage, the patient ultimately developed a colocutaneous fistula that required surgical excision and right hemicolectomy. The risks for developing this complication as well as measures to minimize this risk are discussed.
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Lubner MG, Hinshaw JL, Andreano A, Sampson L, Lee FT, Brace CL. High-powered microwave ablation with a small-gauge, gas-cooled antenna: initial ex vivo and in vivo results. J Vasc Interv Radiol 2012; 23:405-11. [PMID: 22277272 DOI: 10.1016/j.jvir.2011.11.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 11/01/2011] [Accepted: 11/06/2011] [Indexed: 02/08/2023] Open
Abstract
PURPOSE To evaluate the performance of a gas-cooled, high-powered microwave system. MATERIALS AND METHODS Investigators performed 54 ablations in ex vivo bovine livers using three devices-a single 17-gauge cooled radiofrequency(RF) electrode; a cluster RF electrode; and a single 17-gauge, gas-cooled microwave (MW) antenna-at three time points (n = 6 at 4 minutes, 12 minutes, and 16 minutes). RF power was applied using impedance-based pulsing with maximum 200 W generator output. MW power of 135 W at 2.45 GHz was delivered continuously. An approved in vivo study was performed using 13 domestic pigs. Hepatic ablations were performed using single applicators and the above-mentioned MW and RF generator systems at treatment times of 2 minutes (n = 7 MW, n = 6 RF), 5 minutes (n = 23 MW, n = 8 RF), 7 minutes (n = 11 MW, n = 6 RF), and 10 minutes (n = 7 MW, n = 9 RF). Mean transverse diameter and length of the ablation zones were compared using analysis of variance (ANOVA) with post-hoc t tests and Wilcoxon rank-sum tests. RESULTS Single ex vivo MW ablations were larger than single RF ablations at all time points (MW mean diameter range 3.5-4.8 cm 4-16 minutes; RF mean diameter range 2.6-3.1 cm 4-16 minutes) (P < .05). There was no difference in mean diameter between cluster RF and MW ablations (RF 3.3-4.4 cm 4-16 minutes; P = .4-.9). In vivo lesion diameters for MW (and RF) were as follows: 2.6 cm ± 0.72 (RF 1.5 cm ± 0.14), 3.6 cm ± 0.89 (RF 2.0 cm ± 0.4), 3.4 cm ± 0.87 (RF 1.8 cm ± 0.23), and 3.8 cm ± 0.74 (RF 2.1 cm ± 0.3) at 2 minutes, 5 minutes, 7 minutes, and 10 minutes (P < .05 all time points). CONCLUSIONS Gas-cooled, high-powered MW ablation allows the generation of large ablation zones in short times.
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Affiliation(s)
- Meghan G Lubner
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53792-3252, USA.
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Tiong LU, Field JBF, Maddern GJ. Bimodal electric tissue ablation (BETA) compared with the Cool-Tip RFA system. ANZ J Surg 2012; 82:269-74. [PMID: 22510186 DOI: 10.1111/j.1445-2197.2011.05990.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Bimodal electric tissue ablation (BETA) incorporates the process of electrolysis into radiofrequency ablation (RFA) to increase the size of tissue ablation. This study investigated whether BETA could increase the efficacy of the Cool-Tip RF system (Covidien, Boulder, CO, USA) to produce larger ablations. It also investigated whether applying electrolysis only during the pretreatment phase (called electrochemical treatment (ECT)/RFA group) is as effective as BETA (where electrolysis was used during both the pretreatment and RFA phases). METHODS A Cool-Tip RF system (Covidien) was used to test three types of ablations (RFA, BETA, and ECT/RFA) in a pig liver model. In BETA, 9 V of direct current was provided for 10 min, after which the RF generator was started and both electrical circuits were allowed to run concurrently. In ECT/RFA, however, the direct current circuit was switched off after 10 min of pretreatment and only RFA was performed as described above. Ablation sizes were measured in three dimensions. RESULTS The size of ablations (transverse diameter A and B) produced by BETA and ECT/RFA was significantly larger compared with standard RFA (P < 0/001). BETA also created larger ablations compared with ECT/RFA (P < 0.001). CONCLUSION BETA could improve the efficacy of the Cool-Tip RF system (Covidien) to achieve larger ablations. The increased tissue hydration improved delivery of electrical energy to the tissues and delayed the process of desiccation, thus allowing the ablation process to continue for longer periods of time to produce larger ablations. BETA could be used to treat larger liver tumours more effectively than standard RFA.
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Affiliation(s)
- Leong Ung Tiong
- University of Adelaide Discipline of Surgery, The Queen Elizabeth Hospital, Adelaide, South Australia, Australia
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Lee J, Lee JM, Yoon JH, Lee JY, Kim SH, Lee JE, Han JK, Choi BI. Percutaneous radiofrequency ablation with multiple electrodes for medium-sized hepatocellular carcinomas. Korean J Radiol 2011; 13:34-43. [PMID: 22247634 PMCID: PMC3253401 DOI: 10.3348/kjr.2012.13.1.34] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2009] [Accepted: 08/26/2011] [Indexed: 12/29/2022] Open
Abstract
Objective To prospectively evaluate the safety and short-term therapeutic efficacy of switching monopolar radiofrequency ablation (RFA) with multiple electrodes to treat medium-sized (3.1-5.0 cm), hepatocellular carcinomas (HCC). Materials and Methods In this prospective study, 30 patients with single medium-sized HCCs (mean, 3.5 cm; range, 3.1-4.4 cm) were enrolled. The patients were treated under ultrasonographic guidance by percutaneous switching monopolar RFA with a multichannel RF generator and two or three internally cooled electrodes. Contrast-enhanced CT scans were obtained immediately after RFA, and the diameters and volume of the ablation zones were then measured. Follow-up CT scans were performed at the first month after ablation and every three months thereafter. Technical effectiveness, local progression and remote recurrence of HCCs were determined. Results There were no major immediate or periprocedural complications. However, there was one bile duct stricture during the follow-up period. Technical effectiveness was achieved in 29 of 30 patients (97%). The total ablation time of the procedures was 25.4 ± 8.9 minutes. The mean ablation volume was 73.8 ± 56.4 cm3 and the minimum diameter was 4.1 ± 7.3 cm. During the follow-up period (mean, 12.5 months), local tumor progression occurred in three of 29 patients (10%) with technical effectiveness, while new HCCs were detected in six of 29 patients (21%). Conclusion Switching monopolar RFA with multiple electrodes in order to achieve a sufficient ablation volume is safe and efficient. This method also showed relatively successful therapeutic effectiveness on short-term follow up for the treatment of medium-sized HCCs.
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Affiliation(s)
- Jung Lee
- Seoul National University Hospital, Seoul 110-744, Korea
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Haidu M, Dobrozemsky G, Schullian P, Widmann G, Klaus A, Weiss H, Margreiter R, Bale R. Stereotactic radiofrequency ablation of unresectable intrahepatic cholangiocarcinomas: a retrospective study. Cardiovasc Intervent Radiol 2011; 35:1074-82. [PMID: 22006031 DOI: 10.1007/s00270-011-0288-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2011] [Accepted: 09/25/2011] [Indexed: 12/17/2022]
Abstract
PURPOSE To evaluate treatment effects, complications, and outcome of percutaneous stereotactic radiofrequency ablation (SRFA) of intrahepatic cholangiocarcinoma (ICC). PATIENTS AND METHODS Eleven consecutive patients (nine men and two women) with a total of 36 inoperable ICCs (18 initial lesions, 16 lesions newly detected during follow-up, and two local recurrences) underwent SRFA between December 2004 and June 2010. Two different radiofrequency ablation (RFA) devices with internally cooled electrodes were used. Tumor diameters ranged from 0.5 to 10 cm (median 3.0 cm). A total of 23 SRFA sessions were performed. The efficacy of SRFA was evaluated by contrast-enhanced computed tomography or magnetic resonance imaging 1 month after treatment and then every 3 months. RESULTS Primary technical effectiveness rate was 92%. Further follow-up every 3 months revealed three local recurrences (8%), two of which were successfully retreated, resulting in a secondary technical effectiveness rate of 98%. After a total of 23 RFA sessions, three major complications occurred (13%) that could be managed interventionally. Mean follow-up time was 35 months (range 12-81 months). One- and 3-year overall survival rates were 91 and 71%, respectively. The median overall survival was 60 months (according to the life table method). Eight (73%) of 11 patients were still alive at the end of follow-up. CONCLUSION SRFA is effective in the treatment of unresectable ICC even if the tumor is large and located close to major vessels. SRFA shows a survival benefit compared to other palliative treatment options and may also be considered as the first-line local treatment of ICCs in selected patients.
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Affiliation(s)
- Marion Haidu
- Department of Microinvasive Therapy, Medical University Innsbruck, Innsbruck, Austria.
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Distant infusion of saline may enlarge coagulation volume during radiofrequency ablation of liver tissue using cool-tip electrodes without impairing predictability. AJR Am J Roentgenol 2011; 196:W837-43. [PMID: 21606278 DOI: 10.2214/ajr.10.5202] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
OBJECTIVE Our aim was to evaluate the capability of a Cool-tip electrode to create larger coagulation volumes combined with a low-flow (0.1 mL/min) perfusion of hypertonic saline at a distance of 2 mm (hybrid applicator) without reducing either predictability or sphericity of the coagulation zone. MATERIALS AND METHODS A total of 48 radiofrequency ablations were performed on a total of 12 adult pigs: 24 with the Cool-tip (group 1) and 24 with the hybrid applicator (group 2). Volumes and diameters were assessed both macroscopically and with imaging techniques (ultrasound and MRI). Digital reconstruction techniques were also used. Reproducibility of the coagulations was assessed by means of the coefficient of variation. RESULTS The macroscopic assessment showed a significantly larger coagulation zone in group 2 than in group 1, both with (19.40 ± 11.38 cm(3) vs 9.16 ± 5.62 cm(3); p < 0.001) and without (19.54 ± 11.39 cm(3) vs 9.21 ± 5.74 cm(3); p < 0.001) digital reconstruction. Differences were also significant in the MRI assessment. The minimum transverse diameter was also significantly (p < 0.01) larger in group 2 than group 1: 2.46 ± 0.61 versus 1.86 ± 0.55 cm for macroscopic assessment, 2.33 ± 0.96 versus 1.69 ± 0.53 cm for ultrasound, and 2.41 ± 0.58 versus 1.8 ± 0.52 cm for MRI. The coefficient of variation was similar in both groups. CONCLUSION The results suggest that low-flow perfusion of hypertonic saline at 2 mm from a Cool-tip electrode could increase coagulation zone volume without reducing predictability.
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Abstract
The 5-year survival for all stages of nonsmall cell lung cancer (NSCLC) remains bleak, having increased from 13% to just 16% over the past 30 years. Despite promising results in nonoperative patients with NSCLC and pulmonary metastatic disease, thermal ablation appears to be limited by large tumor size and proximity to large vessels. This article discusses the particular challenges of performing thermal ablation in aerated lung tissue and reviews important considerations in performing ablation including treatment complications and imaging follow-up. The article compares and contrasts the three major thermal ablation modalities: radiofrequency ablation, microwave ablation, and cryoablation.
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Affiliation(s)
- P David Sonntag
- Department of Radiology, University of Wisconsin, 600 Highland Avenue, Madison, WI 53792, USA
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Clasen S, Rempp H, Schmidt D, Schraml C, Hoffmann R, Claussen CD, Pereira PL. Multipolar radiofrequency ablation using internally cooled electrodes in ex vivo bovine liver: correlation between volume of coagulation and amount of applied energy. Eur J Radiol 2010; 81:111-3. [PMID: 21112714 DOI: 10.1016/j.ejrad.2010.10.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Revised: 10/20/2010] [Accepted: 10/20/2010] [Indexed: 11/28/2022]
Abstract
PURPOSE To evaluate the relationship between applied energy and volume of coagulation induced by multipolar radiofrequency (RF) ablation. METHODS AND MATERIALS Multipolar RF ablations (n=80) were performed in ex vivo bovine liver. Three bipolar applicators with two electrodes located on each applicator shaft were placed in a triangular array. The power-output (75-225 W) and the distance between the different applicators (2, 3, 4, 5 cm) were systematically varied. The volume of confluent white coagulation and the amount of applied energy were assessed. Based on our experimental data the relationship between the volume of coagulation and applied energy was assessed by nonlinear regression analysis. The variability explained by the model was determined by the parameter r(2). RESULTS The volume of coagulation increases with higher amounts of applied energy. The maximum amount of energy was applied at a power-output of 75 W and an applicator distance of 5 cm. The corresponding maximum volume of coagulation was 324 cm(3) and required an application of 453 kJ. The relationship between amount of applied energy (E) and volume (V) of coagulation can be described by the function, V=4.39E(0.7) (r(2)=0.88). By approximation the volume of coagulation can be calculated by the linear function V=0.61E+40.7 (r(2)=0.87). CONCLUSION Ex vivo the relationship between volume of coagulation and amount of applied energy can be described by mathematical modeling. The amount of applied energy correlates to the volume of coagulation and may be a useful parameter to monitor multipolar RF ablation.
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Affiliation(s)
- Stephan Clasen
- University Hospital, Department of Diagnostic and Interventional Radiology, Hoppe-Seyler Str. 3, 72076 Tübingen, Germany.
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