Publications by authors named "Cabrera-Santiago Alexis"
. To investigate the effect of the position and orientation of the detector and its influence on the determination of output factors (OF) for small fields for a linear accelerator (MR-linac) integrated with 1.5 T magnetic resonance following the TRS-483 formalism.
View Article and Find Full Text PDFPurpose: To show the workflow for the commissioning of a MRlinac, and some proposed tests; off-axis targets, output factors for small fields, dose in inhomogeneities, and multileaf collimator quality assurance (MLC QA).
Methods: The tests were performed based on TG-142, TG-119, ICRU 97, TRS-398, and TRS-483 recommendations as well as national regulations for radiation protection and safety.
Results: The imaging tests are in agreement with the protocols.
. To evaluate the feasibility of use of an 1.5 T magnetic resonance (MR)-linear accelerator MR-linac for imaging in gynaecologic high-dose-rate (HDR) brachytherapy.
View Article and Find Full Text PDFArticle Synopsis
- The energy dependence of Gafchromic films when exposed to low-energy photons is influenced by the absorbed dose, as highlighted in studies using a relative-response (R) measurement that doesn't account for the film’s sensitive area.
- Research on Gafchromic EBT3 and MD-V3 films demonstrated that a new measure called relative-efficiency (RE) shows Co gamma rays require significantly higher absorbed doses compared to 20 kV x-rays to achieve the same optical density (netOD).
- Findings suggest that a new factor (f), which considers energy-dependence influenced by film model, depth, and phantom material, could better evaluate film performance than the traditional relative-response methodology.