Targeting accuracy of CT-guided stereotaxy for radiofrequency ablation of XXXX .

@entity1 @entity96 @entity409 @entity16028 @entity2246
The targeting accuracy during CT-guided stereotactic radiofrequency ablation (SRFA) of @entity96 was evaluated in a clinical study. @entity1 under general anaesthesia were immobilized using a vacuum cushion and respiratory motion control was based on temporary disconnections of the endotracheal tube. An optical-based navigation system was used for 3D trajectory planning and needle placement via a stereotactic aiming device. A control CT with the needles in place was fused with the planning CT for accuracy evaluation. Sub-analysis was performed for "location" (liver segments II-VIII), "approach" (intercostal or transabdominal), "properties" (clear parenchymal, subcapsular, subphrenic, fat, and subphrenic plus fat), and "path length". In 20 @entity1 with 35 @entity409 , a total of 145 needles were placed with mean (  SD) lateral errors of 3.6    2.5 mm at the needle tip, angular errors of 1.3      1.2  , and @entity2246 at the needle tip of -7.4    6.2 mm. No puncture-related complications were noted. No significant differences of angular errors between segments, approach and properties were recorded. Long paths correlated with @entity16028 . CT-guided stereotaxy can be considered safe and provided precise multiple needle placement for SRFA of @entity409 at arbitrary trajectories in various segments and locations.
