Abstract
Purpose: To present first results of radiofrequency ablation of liver tumors using a new MR compatible applicator. Materials and Methods: We performed 37 interventions in 20 patients (mean age 58.6 years) with primary intrahepatic malignancies or metastases: colorectal carcinoma n = 6, hepatocellular carcinoma n = 3, pancreatic carcinoma n = 4, sarcoma n = 2, cholangiocellular carcinoma n = 1, carcinoma of the tonsil n = 1, breast carcinoma n = 1, gastric carcinoma n = 1, and gastrointestinal stroma tumor n = 1. Interventions were performed under CT-guidance with CT fluoroscopy (n = 32) and under MR-guidance (n = 5) using fast T1-weighted sequences in breath-hold technique. RFA was performed with the RF-generator (150 W) under local anesthesia and sedation using MR compatible applicators (Starburst XL, Rita Medical Systems, USA) together with the appropriate Soft Tissue Introducer System. Intra-interventional control was performed with intrahepatically or intralesionally placed introducer system or applicator. MRI was performed with plain breath-triggered T2-weighted turbo spin echo sequences (TSE T2) with fat saturation. Results: All interventions were performed without major events. The mean diameter of induced coagulation was 4.0 (± 0.7) cm. Repositioning was necessary in 8 interventions (21%) after detection of residual tumor on an intra-interventional MRI. After a mean follow-up of 6.5 (± 1.2) months, the local tumor control rate was 92%. Conclusion: MR-compatible RF applicators offer the opportunity for intra-interventional detection of residual tumor during RF ablations by use of sensitive MRI sequences. These procedures may lead to a higher confidence in tumour ablation and may reduce the number of re-interventions and local recurrences of intrahepatic tumors.
Translated title of the contribution | Potential advantages of the MRI for the radiofrequency ablation of liver tumors |
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Original language | German |
Pages (from-to) | 77-83 |
Number of pages | 7 |
Journal | RoFo Fortschritte auf dem Gebiet der Rontgenstrahlen und der Bildgebenden Verfahren |
Volume | 177 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2005 |
Externally published | Yes |
Keywords
- Interventional MR
- Liver
- Liver neoplasms
- MR
- Radiofrequency ablation
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
- Radiological and Ultrasound Technology