Abstract
Summary Objective: Presentation of MR guided laser-induced thermotherapy (LITT) for percutaneous interstitial thermotherapy of malignant liver tumours and soft tissue lesions. Material and methods: MR-guided LITT is carried out by means of catheter systems that can be implanted percutaneously. CT or open MRI technologies are used as the control method for inserting the catheter. Irrigated application systems are available for LITT. Findings: Percutaneous LITT currently permits local tumour control of 97.2% for localised liver metastases without an extrahepatic manifestation pattern. In a patient population of 729 patients median survival times of 45.0 months for liver metastases, 42.6 months for patients with colorectal liver metastases have been documented. In the treatment of soft tissue tumours in the head and neck and pelvis MRI guided LITT allows an excellent local tumour control rate and reduces clinical symtoms in a palliative manner. Conclusions: Percutaneous MR-guided LITT permits a high level of tumour control in the case of liver metastases and soft tissue tumours smaller or equal to 5 cm and a maximum number of 5 lesions with an improvement of survival data.
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