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Item Metadata only Comparison of absolute dose from therapeutic photon beams in a chest rando phantom: treatment planning calculation, monte carlo simulation, and TLD measurement(Mahidol University. Mahidol University Library and Knowledge Center, 2012) Wasuma Rakkrai; Vipa Boonkitticharoen; Nakorn PhaisangittisakulItem Metadata only Dosimetric investigation of Proton therapy on CT-based patient data using Monte Carlo Simulation(Mahidol University. Mahidol University Library and Knowledge Center, 2016) Thanaphat Chongsan; Puangpen Tangboonduangjit; Thiansin Liamsuwanvalues of electron densities in the Tissue Characterization Phantom GammexTM 467. A MATLAB-based proton therapy treatment planning program was used to create the beam delivery control file for the patient-specific Monte Carlo simulation. The treatment... function. This work was a pilot project for the development of a computational platform for dosimetric investigation of proton therapy using Monte Carlo simulation and patient CT data. The approach as carried out in this work could be interestingItem Metadata only Detemination of Output Factor for 6 MV small Photon Beam : Comparison between Monte Carlo Simulation Technique and MicroDiamond Detector(Mahidol University. Mahidol University Library and Knowledge Center, 2016) Komkrit Krongkietlearts; Puangpen Tangboonduangjit; Nakorn PhaisangittisakulIn order to improve the quality of life for cancer patient, the radiation techniques are constantly evolving. As a result, the two modern techniques which are intensity modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT.... The percentage depth dose and beam profile at 5 and 10 cm depth were also analyzed. The results were compared with those measured by the stereotactic field detector (SFD: Scanditronix IBA) and the Monte Carlo simulation (EGSnrc / BEAMnrc / DOSXYZItem Metadata only Tolerance level determination for automated EPID-based deep inspiration breath-hold (DIBH) instability evaluation in breast cancer patients(Mahidol University. Mahidol University Library and Knowledge Center, 2024) Aphisara Deeharing; Puangpen Tangboonduangjit; Todsaporn Fuangrodof the patient breath-hold. The system performance was tested from the three experimental setups with phantom to simulate the motion for test accuracy, reproducibility, and capability. For the clinical tests, there were randomly three patients for evaluating...Breast cancer is the most common cancer in women. Radiation therapy (RT) is the most recommended treatment to reduce local recurrence and improves the overall survival rate. However, RT has limitations regarding the patient's respiratory motionItem Metadata only Determination of radiation dose from Ruthenium-106/Rhodium-106 plaque for radiation safety in ophthalmic brachytherapy(Mahidol University. Mahidol University Library and Knowledge Center, 2024) Gunjanaporn Tochaikul; Putthiporn Charoenphun; Krisanat Chuamsaamarkkee; Chayanit Jumpeeand the Monte Carlo (MC) simulation and to compare the radiation doses between the two approaches as well as to assess the safety of 106Ru/106Rh ophthalmic brachytherapy. The count rates and spectrum of the 106Ru/106Rh plaque which was placed on the RANDO... configured to simulate the HPGe detector was used to calculate the count rates and the spectrum of 106Ru/106Rh plaque with the same geometry to that of the experimental measurement. Then, the radiation doses of the ophthalmic brachytherapy were calculatedItem Metadata only Risk estimation of radiation induced second cancers for three dimensional conformal radiotherapy (3D-CRT) and intensity modulated radiotherapy (IMRT)(Mahidol University. Mahidol University Library and Knowledge Center, 2009) Siwaporn Sakulsingharoj; Vipa Boonkitticharoen; Chirapha Tannanonta; Chumpot Kakanaporn; Porntip IampongpaiboonThe main purpose of this study was to determine and evaluate the organ equivalent dose (OED) used for the calculation of second cancer risk in prostate cancer patients treated with 10 MV photon, either using three-dimensional conformal radiotherapy... (3D-CRT) or intensity modulated radiotherapy (IMRT) technique. Both 3D-CRT and IMRT plans were optimized for each of the 10 patients using Eclipse Radiation Therapy Planning System (RTPS), from which the differential dose volume histograms (dItem Metadata only Implementation of the catalyst optical surface imaging system for left-sided breast cancer patients with Deep Inspiration Breath Hold Technique(Mahidol University. Mahidol University Library and Knowledge Center, 2024) Sawanya Suwandee; Lalida Tuntipumiamorn; Pittaya Dankulchai; Puangpen Tangboonduangjitin left-sided breast cancer patients. The purpose of this study was to evaluate the performance and reliability of the CatalystTM OSI system which is installed at Division of Radiation Oncology, Siriraj Hospital for image guidance in DIBH application.... Then, the overall accuracy of treatment process in OSI implementation was examined using the end-to-end test with thorax phantom. For patient positioning, a total of 253 individual setups from the OSI in 20 patients were retrospectively compared with the routine