With the application of image-guided brachytherapy (IGBT) the dose conformity increases, but the method still depends on the ability of the radiation oncologist to delineate to a high degree of accuracy the target structures. The results of this study show that the application of the GYN GEC-ESTRO recommendations for IGBT contouring at two different institutions (Institut Gustave Roussy and Medical University of Vienna) with two different traditions for applicators, CTV assessment, MR image acquisition and dose prescription is feasible, and produces acceptable inter-observer variability.
COBISS.SI-ID: 694651
Brachytherapy MRI based treatment planning can be employed succesfully only if the important issues of inter- and intraobserver contouring variability and MR image orientation are thoroughly investigated. Our results show that contouring in paratransverse (PT), as compared to transverse (T) plane, facilitates a comprehensive understanding of spatial relations between the applicator and the patho-anatomical structures. HR-CTV delineation in PT, as compared to T orientation is marked by a similar contouring time, is reproducible and leads to a comparable outcome in terms of DVH parameters.
COBISS.SI-ID: 691323