Advanced Physics for Brachytherapy 2018

Modern Brachytherapy Treatment Planning Catheters/Applicators (Sources) Localisation

source dwell positions

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-Object”

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, …)

GEC-ESTRO Recommendations, Hellebust T., Kirisits, C., Berger, D., et al., Rad Oncol 95, 153-160, 2010.