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Thermoablation
Thermoablation is performed with thin laser applicators (laser induced thermotherapy = LITT) or radiofrequency electrodes of a few mm. In every case it is a minimally invasive procedure, i.e. the applicators must be implanted in the lesions under CT or MR guidance. Achieved temperatures are high (up to 90 °C), but the thermal gradients are quite steep and the effective range is 1 – 2 cm (i.e. lesions with diameters of 3 – 4 cm are the limit using standard techniques).
Liver metastases (number up to 4) are the most frequent indication. The procedures are typically performed under MR control.
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