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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