Publications by authors named "Hajime Ohyoshi"
Article Synopsis
- The study aimed to compare hybrid intensity-modulated radiotherapy (Hybrid IMRT/VMAT) and non-coplanar IMRT/VMAT plans for treating unresectable olfactory neuroblastoma (ONB).
- The results indicated that Hybrid IMRT/VMAT provided better target conformity and a reduction in the equivalent uniform dose (EUD) to the optic nerves compared to the non-coplanar plans, while still sparing organs at risk effectively.
- Despite these improvements, the differences in normal tissue complication probability (NTCP) across the techniques were minimal, suggesting that clinical benefits may not be significantly impacted.
Radiobiological model-based studies of photon-modulated radiotherapy for pancreatic cancer have reported reduced gastrointestinal (GI) toxicity, although the risk is still high. The purpose of this study was to investigate the potential of 3D-passive scattering proton beam therapy (3D-PSPBT) in limiting GI organ at risk (OAR) toxicity in localized pancreatic cancer based on dosimetric data and the normal tissue complication probability (NTCP) model. The data of 24 pancreatic cancer patients were retrospectively analyzed, and these patients were planned with intensity-modulated radiotherapy (IMRT), volume-modulated arc therapy (VMAT), and 3D-PSPBT.
View Article and Find Full Text PDFAim: The primary objective was to assess set-up errors (SE) and secondary objective was to determine optimal safety margin (SM).
Background: To evaluate the SE and its impact on the SM utilizing electronic portal imaging (EPI) for pelvic conformal radiotherapy.
Material And Methods: 20 cervical cancer patients were enrolled in this prospective study.