Oncology, Radiology, Nuclear Medicine & Medical Imaging

Purpose/Objective(s): Stereotactic body radiotherapy (SBRT) has shown promising results for patients with recurrent ventricular tachycardia that failed catheter ablation. The simplest method of target delineation based on manual transfer of CTV from several 3D visualizations (electroanatomic mapping system) to planning CT slices (2D) was subjective and very time consuming. Advanced methods are based on merging of electroanatomic maps (EAM) with CT. To date, 2 types of EAM-CT merge were proposed:manual alignment of EAM structures with segmented CT structures [1,2] and use of semi-automatic algorithm [3]. The goal of this work was to modify current method [2] with the use of robust automatic algorithms to assure reasonably short learning curve.