RAMUS , Liliane

The goal of this thesis is to provide automatic segmentation tools based on the use of anatomical atlases. The proposed algorithms are applied and evaluated in the context of radiotherapy of head and neck cancers : segmentation of the organs at risk and the lymph node levels of the neck for treatment planning, and segmentation of the teeth to...

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Radiotherapy planning requires accurate delineations of the critical structures. To avoid manual contouring, atlas-based segmentation can be used to get automatic delineations. However, the results strongly depend on the chosen atlas, especially for the head and neck region where the anatomical variability is high. To address this problem,...

International Journal of Radiation Oncology Biology Physics

With new irradiation techniques, the dose can be better matched to the contours of the tumour. The corollary is that greater precision is required. Recent intercomparison studies of treatment plans have emphasized the need to harmonise contouring practices. More of a consensus approach is based on using adaptive imaging modalities, expert group...

Highly conformal irradiation techniques are associated with steep gradient doses. Accuracy and reproducibility of delineation are required to avoid geometric misses and to properly report dose-volume effects on organs at risk. Guidelines of the International Commission on Radiation Units have largely contributed to high quality treatments. The...

21e Congrès national de la Société Française de Radiothérapie Oncologique SFRO)

International audience