Publications by authors named "Seiya Murata"
Article Synopsis
- A portable respiratory training system called the Gyroscope Respiratory Training System (GRTS) was developed to assess the feasibility of respiratory training.
- The study involved comparing respiratory waveforms from patients using GRTS and another system, the Respiratory Gating for Scanners (RGSC), to evaluate the stability and reproducibility of these waveforms during expiratory breath-hold radiation therapy.
- Results showed that GRTS provided similar accuracy to RGSC and effectively reduced variability in respiratory waveforms among patients, indicating its potential as an affordable and functional tool for respiratory training in clinical settings.
Setup accuracy and dose attenuation of a wooden immobilization system for lung stereotactic body radiotherapy.
Rep Pract Oncol Radiother
October 2022
Article Synopsis
- The study assessed the effectiveness of an immobilization system using a shell and wooden baseplate (SW) for lung stereotactic body radiotherapy (SBRT) by comparing setup errors and dose absorption to those from a BodyFix system (BF).
- In 109 patients, setup errors were measured, showing that both SW and BF achieved high accuracy, with over 90% success in keeping errors within 3 mm for interfractional and intrafractional shifts.
- The results indicated that the wooden baseplate had lower dose attenuation and a lesser impact on dose distribution compared to the carbon baseplate, making it a viable option for effective SBRT.
Dosimetric impact of baseline drift in volumetric modulated arc therapy with breath holding.
Rep Pract Oncol Radiother
June 2020
Background: We investigated the change of dose distributions in volumetric modulated arc therapy (VMAT) under baseline drift (BD) during breath holding.
Materials And Methods: Ten VMAT plans recalculated to a static field at a gantry angle of 0° were prepared for measurement with a 2D array device and five original VMAT plans were prepared for measurement with gafchromic films. These measurement approaches were driven by a waveform reproducing breath holding with BD.
Article Synopsis
- This study examines how well two types of patient immobilization devices perform in maintaining consistent positioning during image-guided radiation therapy (IGRT) for prostate cancer.
- The MOLDCARE device uses hydraulic fixation, while the BlueBAG and Vac-Lock use vacuum fixation, with 72 patients being analyzed using customized setups during CT simulations and subsequent treatment sessions.
- Results showed that while the vacuum devices (BlueBAG and Vac-Lock) had slightly more positional shifts in the anterior-posterior direction compared to MOLDCARE, overall positioning reproducibility was not significantly affected by the type of immobilization device used.