Intracavitary brachytherapy is commonly used in the treatment of cervical cancer.
Accurate geometrical information of the
tumour, surrounding structures, and brachytherapy applicator is required for the definition
of an optimal treatment plan.
Magnetic resonance (MR) imaging provides an excellent definition of the anatomical
structures, but the possible source
path inside the applicator is not directly visible with this image modality. Hence
the goal of this research is to develop an
automatic algorithm for recovering the full pose (position and orientation) of a brachytherapy
ring applicator in MR images,
which can be directly used to digitize the source path inside the 3D MRI dataset.