2013 Volume 31 Issue 1 Pages 1-9
Purpose: CT volumetrics are used to investigate energy applied to volume of ablated liver parenchyma in patients who underwent single antenna, single application (SA-SA) microwave ablation (MWA).
Methods: Retrospective review was performed of all patients undergoing hepatic MWA. Two groups were identified: patients with hepatocellular carcinoma and cirrhosis and those with other malignancies without cirrhosis. Ablation volumes were calculated using open source imaging software.
Results: 192 patients underwent 338 different tumor ablations. 16 patients with 23 lesions were included. Linear and non-linear regression models were calculated. Evaluation of the cirrhotic group with non-linear logarithmic regression yielded the best fit model of volume achieved to energy applied (MSE 145, R2=0.78). No predictive model was calculated in non-cirrhotics(MSE 615, R2=0.02).
Conclusions: Volume ablated to energy applied ratio in cirrhotics yielded a strongly correlated predictive model; nocorrelation was found in non-cirrhotics.
