Publications by authors named "B Gres"
Purpose: In case of external breast radiotherapy, the usual treatment consists of two tangential beams homogeneously attenuated by a dynamic or physics wedge in order to obtain the most homogeneous dose distribution as possible. Depending of the shape and size of the breast volume, we may observe with this technique dose heterogeneity over 20% from the recommendation of the International Committee on Radiation Units and Measurements (95-107%). We propose to study breast treatment planning by compensating tissues thickness in order to decrease dose heterogeneity observed on the dose distribution for conventional treatment.
View Article and Find Full Text PDFRadiosurgery with or without A 2-mm margin for 93 single brain metastases.
Int J Radiat Oncol Biol Phys
March 2008
Purpose: Retrospective comparison of Linac radiosurgery (RS) in 93 single brain metastases with or without a 2-mm margin.
Patients And Methods: A total of 153 patients had Linac RS (between April 1992 and June 2004), with 139 patients (90.8%) evaluable in June 2005.
Purpose: To study the impact of fused (18)F-fluoro-deoxy-D-glucose (FDG)-hybrid positron emission tomography (PET) and computed tomography (CT) images on conformal radiotherapy planning for esophageal carcinoma patients.
Methods And Materials: Thirty-four esophageal carcinoma patients were referred for concomitant radiotherapy and chemotherapy with radical intent. Each patient underwent CT and FDG-hybrid PET for simulation treatment in the same treatment position.
Article Synopsis
- The study investigates how combining PET and CT imaging impacts radiotherapy planning for non-small-cell lung cancer patients.
- A total of 101 patients were analyzed, with PET imaging revealing additional metastatic disease in 8 patients, affecting their eligibility for curative treatment.
- Image fusion resulted in significant changes in tumor volume estimates for many patients, with 23% experiencing a decrease and 26% an increase in gross tumor volume, highlighting its importance in treatment planning.
Unlabelled: To report a retrospective study concerning the impact of fused 18F-fluorodeoxy-D-glucose (FDG)-hybrid positron emission tomography (PET) and computed tomography (CT) images on three-dimensional conformal radiation therapy (3D-CRT) planning for patients with non-small-cell lung cancer (NSCLC).
Patients And Methods: One hundred and one patients consecutively treated for stages I-III NSCLC were studied. Each patient underwent CT and FDG-hybrid PET for simulation treatment in the same radiation treatment position.