Sho Oyama
YOU?
Author Swipe
View article: Dosimetric effect of internal error correction on pubic bones in image-guided passive scattering proton therapy for prostate cancer
Dosimetric effect of internal error correction on pubic bones in image-guided passive scattering proton therapy for prostate cancer Open
Image-guided passive scattering proton therapy (PSPT) has been widely adopted in Japan and worldwide, with substantial long-term clinical data supporting its efficacy in treating prostate cancer. However, as hypofractionated protocols beco…
View article: Analysis of respiratory‐induced motion trajectories of individual liver segments in patients with hepatocellular carcinoma
Analysis of respiratory‐induced motion trajectories of individual liver segments in patients with hepatocellular carcinoma Open
Purpose To analyze the respiratory‐induced motion trajectories of each liver segment for hepatocellular carcinoma (HCC) to derive a more accurate internal margin and optimize treatment protocol selection. Materials and Methods Ten‐phase‐ga…
View article: Dosimetric effect of six degrees of freedom couch top with rotational setup error corrections in proton therapy
Dosimetric effect of six degrees of freedom couch top with rotational setup error corrections in proton therapy Open
Purpose To investigate the dosimetric effect of six degrees of freedom (6DoF) couch top with rotational corrections in proton therapy (PT). Methods The water equivalent thickness (WET) was measured using a proton beam with a 6DoF couch top…
View article: Dosimetric impact of simulated changes in large bowel content during proton therapy with simultaneous integrated boost for locally advanced pancreatic cancer
Dosimetric impact of simulated changes in large bowel content during proton therapy with simultaneous integrated boost for locally advanced pancreatic cancer Open
Purpose To investigate the dosimetric impact of changes in the large bowel content during proton therapy (PT) with simultaneous integrated boost (SIB) for locally advanced pancreatic cancer (LAPC). Materials and methods Fifteen patients wi…
View article: Trend analysis of the dosimetric impact of anatomical changes during proton therapy for maxillary sinus carcinoma
Trend analysis of the dosimetric impact of anatomical changes during proton therapy for maxillary sinus carcinoma Open
Purpose Anatomical changes, such as shrinkage and aeration, can affect dose distribution in proton therapy (PT) for maxillary sinus carcinoma (MSC). These changes can affect the dose to the target and organs at risk (OARs); however, when t…
View article: The impact of different setup methods on the dose distribution in proton therapy for hepatocellular carcinoma
The impact of different setup methods on the dose distribution in proton therapy for hepatocellular carcinoma Open
Purpose To investigate the impact of different setup methods, vertebral body matching (VM), diaphragm matching (DM), and marker matching (MM), on the dose distribution in proton therapy (PT) for hepatocellular carcinoma (HCC). Materials an…
View article: Preliminary analysis of prostate positional displacement using hydrogel spacer during the course of proton therapy for prostate cancer
Preliminary analysis of prostate positional displacement using hydrogel spacer during the course of proton therapy for prostate cancer Open
In recent years, a novel technique has been employed to maintain a distance between the prostate and the rectum by transperineally injecting a hydrogel spacer (HS). However, the effect of HS on the prostate positional displacement is poorl…
View article: Proportion Test Results of Soil-Bentonite Mixture and Cement Stabilized Soil Using the Crushed Stone Dust (Screenings) for the Surface Impermeable Soil Liner Material
Proportion Test Results of Soil-Bentonite Mixture and Cement Stabilized Soil Using the Crushed Stone Dust (Screenings) for the Surface Impermeable Soil Liner Material Open
Crushed stone dust is stone powder generated in the production process of crushed stone, and crushed stone dust prepared to a maximum particle size of 2.5 mm or less is specified as "Screenings (F-2.5)" by JIS A 5001 (Crushed Stone for Roa…
View article: Influence and Countermeasure of Respiratory Motion on Matchline Profile of Field Matching Technique in Passive Scattering Proton Therapy for Esophageal Cancer
Influence and Countermeasure of Respiratory Motion on Matchline Profile of Field Matching Technique in Passive Scattering Proton Therapy for Esophageal Cancer Open
This study aimed to evaluate the influence of change in respiratory motion on matchline (ML) and reduction of the effect by increasing ML levels of field matching technique in passive scattering proton therapy for esophageal cancer. To eva…
View article: Effect of anatomical change on dose distribution during radiotherapy for maxillary sinus carcinoma: passive scattering proton therapy versus volumetric-modulated arc therapy
Effect of anatomical change on dose distribution during radiotherapy for maxillary sinus carcinoma: passive scattering proton therapy versus volumetric-modulated arc therapy Open
Objective: Maxillary sinus carcinomas are anatomically situated next to many organs at risk (OARs), and anatomical change is often observed during radiotherapy. We analyzed the effect of anatomical change on dose distribution of passive sc…