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Titre : | Radiothérapie externe guidée par limage : analyse de la distribution de dose due à limagerie dans les traitements des cancers pelviens. : Elaboration dun feuillet daccueil |
Auteurs : | Gaëlle Ndole, Auteur ; Stéphane Simon, Promoteur |
Type de document : | Travail de fin d'études |
Année de publication : | 2017 |
Langues: | Français |
Index. décimale : | TFE - Imagerie médicale |
Résumé : |
The cancer has become presently one of the most feared illnesses. With its constant evolution, scientists are working in technical and curative ways to overcome this scourge.
Those in the pelvic region are listed in the most frequent cancers in Belgium, for which there are fortunately various therapeutic means. For prostate and gynaecological cancers, external radiation therapy is commonly used. This approach involves the use of image-guided radiotherapy (IGRT) for verification of patient positioning and the correct delivery of prescribed dose to the target volumes. Furthermore, the correct localisation of volumes of interest allows, respecting the general principal of radioprotection, to restrict the toxicity to the organs at risk, while delivering of a curative high dose to the tumour. The treatment of these cancers involves rigorous bladder and rectal preparations. This can only be verified after the acquisition of the pre-treatment CBCT. In this study, two methods were used to analysis the CBCT dose: one method used an anthropomorphic phantom, while we directly measured CBCT dose on treated patients in the second method. The study showed that non-negligible doses are delivered by CBCT. The number of these examinations is sometimes higher than the number originally scheduled, mostly due to the non-respect of the preparation and to an incorrect initial setup. As a technologist, it is important to choose optimal acquisition parameters for this low-dose scanner in order to minimize the delivered dose to the patient. In addition, RTTs must ensure compliance with the pre-treatment preparation to minimize the number of CBCTs performed on one patient. IGRT by CBCT is today a necessary and useful approach to treat cancer. Nevertheless, one has to keep in mind the associated dose with these positioning examinations. Some ways to reduce their number have been suggested in this report. |
Disponible en ligne : | Non |
Lieu du stage : | Institut Jules Bordet |
Département : | Imagerie médicale |
Exemplaires (1)
Cote | Support | Localisation | Section | Disponibilité |
---|---|---|---|---|
NDO 17 | Travail de fin d'études | Woluwe | Espace livres | Prêt autorisé Disponible |