An MRI protocol for RT planning: preliminary results for distortion, contrast and bulk density assignment
Protocole IRM pour la planification RT : résultats préliminaires pour la distorsion, le contraste et l'assignation de densité
Résumé
The excellent contrast between soft tissues in MRI is of great interest for head and neck radiotherapy planning. This work presents an in vivo study aiming to evaluate a multimodal acquisition protocol for tumors and organs at risks delineation and synthetic CT reconstruction based on a density assignment method. Our results showed better contrast between the tumor and healthy tissues with injected T1 MRI compared to injected CT (44,7 +/-30,5 vs 29,9 +/-27,2) and acceptable geometric distortions (less than 2mm). Fat content mean absolute error between CT and synthetic CT is about 0,27.
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