Advanced Physics for Brachytherapy 2018

Modern Brachytherapy Treatment Planning Catheters/Applicators (Sources) Localisation

In general there are exist two methods for the Localisation of the sources/ possible source dwell positions.

Source Path Method

Here the “ finger-print ” of the individual implanted catheters/ applicators on the acquired images is utilized (interstitial implants, endoluminal and simple endocavitary applicators) 3D-Applicator Model Method Here the 3D Applicator geometry (rigid) is preexisting and stored as a “3D-Object” including all required information for generation of sources/source dwell positions (source paths, all possible source dwell positions and channel length for each path, …) Plastic - CT Metallic - CT Metallic – U/S Breast Gyn Prostate