A5043890602- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Radiation Dose and Imaging
- Advanced X-ray and CT Imaging
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
Osaka University Hospital
2015-2020
Osaka University
2014-2018
Indiana University School of Medicine
2015
Indiana University – Purdue University Indianapolis
2015
For CyberKnife-mediated prostate cancer treatment, a tumour-tracking approach is applied to correct the target location by acquiring X-ray images of implanted fiducial markers intermittently. This study investigated dosimetric impact intra-fraction motion during CyberKnife treatment. We retrospectively analyzed 16 patients treated using (35 Gy delivered in five fractions). Using log files recorded motion, was simulated. defined worst-case as difference between pre- and post-deviation on...
Abstract In this CyberKnife® dose verification study, we investigated the effectiveness of novel potential error (PE) concept when applied to determination a robust measurement point for targeting errors. PE was calculated by dividing differences between maximum increases and decreases in distributions original distribution after obtaining former shifting source-to-axis off-axis distances each beam ±1.0 mm. Thus, values heterogeneity were analyzed 48 patients who underwent CyberKnife...
The purpose of this study was to compare single-arc (SA) and double-arc (DA) treatment plans, which are planning techniques often used in prostate cancer volumetric modulated arc therapy (VMAT), the presence intrafractional deformation (ID) determine technique is superior terms target dose coverage sparing organs at risk (OARs). SA DA plans were created for 27 patients with localized cancer. ID introduced clinical volume (CTV), rectum bladder obtain blurred distributions using an in-house...
A patient-specific quality assurance (QA) test is conducted to verify the accuracy of dose delivery. It generally consists three verification processes: absolute point difference, planar differences at each gantry angle, and by 3D composite irradiation. However, this imposes a substantial workload on medical physicists. The objective study was determine whether our novel method that predicts delivered allows certain IMRT QAs be curtailed. object QA for pelvic region with regard differences....
Correlation model error (CME) between the internal target and external surrogate, marker-tumor correlation (MTCE) tumor implanted marker occur during marker-based real-time tracking. The effects of these intrafraction interfraction errors on dose coverage in clinical volume (CTV) control probability (TCP) for hepatocellular carcinoma (HCC) were evaluated this study. Eight HCC patients treated with non-isocentric delivery by a robotic radiosurgery system enrolled. CMEs extracted from...
Purpose: Monte Carlo codes are becoming important tools for proton beam dosimetry. However, the relationships between customizing parameters and percentage depth dose (PDD) of GATE PHITS have not been reported which studied PDD range compared to FLUKA code experimental data. Methods: The delivery system Indiana University Health Proton Therapy Center was modeled uniform scanning in transferred identically into PHITS. This computational model built from blue print validated with commissioning...
Purpose: In this study we present Monte Carlo based evaluation of the shielding effect for secondary neutrons from patient collimator, and photons emitted in process neutron by combination moderator boron‐10 placed around collimator. Methods: The PHITS Simulation radiation transport code was used to simulate proton beam (Ep = 64 93 MeV) a therapy facility. study, moderators (water, polyethylene paraffin) boron (pure 1 ⁰B) were collimator order. rate thicknesses changed fixing total thickness...