Publications by authors named "J Fukunaga"
This study examined the characteristics of the broad model (KBP) through a complete open-loop evaluation of volumetric modulated arc therapy (VMAT) plans for prostate cancer in 30 patients at two institutions. KBP, trained using 561 prostate cancer VMAT plans from five institutions with different treatment protocols, was shared with two institutions. The institutions were not involved in the creation of KBP.
View Article and Find Full Text PDF[Development of Isocenter Measurement Method Considering the Displacement of the Focal-spot Position of a Medical Linear Accelerator].
Nihon Hoshasen Gijutsu Gakkai Zasshi
December 2024
Article Synopsis
- The study focuses on measuring beam alignment in medical linear accelerators, emphasizing the importance of analyzing focal spot positions to ensure accurate radiation delivery.
- The newly developed Quality Control Tool (QCT) device facilitates simultaneous tests of light/radiation field coincidence and isocenter testing, enabling effective analysis of focal spots with specific software.
- Results show that focal spot position varies with gantry angle, showcasing the QCT's capacity to accurately measure displacements and assess beam alignment without interference from the jaw collimator.
Article Synopsis
- * Five healthcare institutions tested this model on prostate cancer treatments, comparing how well each model could estimate dosimetric parameters and plan quality.
- * Results showed the Multi-coll. model was more accurate in its estimates and provided better plan quality, particularly in reducing radiation exposure to the rectum and bladder.
In this study, we aimed to conduct a survey on the current clinical practice of, staffing for, commissioning of, and staff training for online adaptive radiotherapy (oART) in the institutions that installed commercial oART systems in Japan, and to share the information with institutions that will implement oART systems in future. A web-based questionnaire, containing 107 questions, was distributed to nine institutions in Japan. Data were collected from November to December 2023.
View Article and Find Full Text PDFThe aim of this study was to investigate planning target volume (PTV) margin in online adaptive radiation therapy (oART) for gastric mucosa-associated lymphoid tissue (MALT) lymphomas. Four consecutive patients with gastric MALT lymphoma who received oART (30 Gy in 15 fractions) on the oART system were included in this study. One hundred and twenty cone-beam computed tomography (CBCT) scans acquired pre- and post-treatment of 60 fractions for all patients were used to evaluate intra- and interfractional motions.
View Article and Find Full Text PDF