Search Results - "Sang Hyoun Choi"

RPLD-based postal dosimetry audits for radiotherapy hospitals: a full investigation of linear accelerators in the Republic of Korea by Kim, Kyo-Tae, Cho, Gyu-Seok, Choi, Sang-Hyoun, Kim, Kum-Bae

“…Radiation therapy technology has been advancing with a focus on enhancing treatment efficiency based on state-of-the-art medical physics technologies. The…”
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Clinical Efficacy of an Electronic Portal Imaging Device versus a Physical Phantom Tool for Patient-Specific Quality Assurance by Baek, Seung-Hyeop, Choi, Sang-Hyoun, Han, Moo-Jae, Cho, Gyu-Seok, Jang, Wonil, Kim, Jin-Sung, Kim, Kum-Bae

“…Pre-treatment patient-specific quality assurance (QA) is critical to prevent radiation accidents. The electronic portal imaging device (EPID) is a dose…”
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Stabilization of Mercuric Iodide Using Titanium and Silicon Oxides by Kim, Kum-Bae, Kim, Jin-Seon, Kim, Kyo-Tae, Choi, Sang-Hyoun, Cho, Gyu-Seok, Jang, Won-Il, Kwon, Soo-il

“…Digital x-ray detectors consist of a conversion material, which converts incident radiation to an electrical signal, as well as a read-out circuit that is used…”
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Preliminary study for the development of radiation safety evaluation methodology for industrial kV-rated radiation generator facilities by Hye Sung Park, Na Hye Kwon, Sang Rok Kim, Hwidong Yoo, Jin Sung Kim, Sang Hyoun Choi, Dong Wook Kim

“…Background: This study aims to develop an evaluator that can quickly and accurately evaluate the shielding of low-energy industrial radiation generators…”
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Improvement of accuracy in radioactivity assessment of medical linear accelerator through self-absorption correction in HPGe detector by Suah Yu, Na Hye Kwon, Sang-Rok Kim, Young Jin Won, Kum Bae Kim, Se Byeong Lee, Cheol Ha Baek, Sang Hyoun Choi

“…Medical linear accelerators with an energy of 8 MV or higher are radiated owing to photonuclear reactions and neutron capture reactions. It is necessary to…”
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Development of a Gd2O2S:Tb Phosphor Screen with an Anti-reflective Layer Fabricated Using Poly Chloro-para-xylylene to Improve Optical Properties in Radiography by Cho, Gyu-Seok, Choi, Sang-Hyoun, Kim, Kyo-Tae, Kim, Kum-Bae, Kim, Joo-Hee, Lee, Soon-Sung, Heo, Ye-Ji, Jang, Won-Il, Mun, Chi-Woong

“…In this study, we developed a Gd 2 O 2 S:Tb screen with a parylene-C-based antireflective (AR) layer and evaluated its optical and X-ray response properties;…”
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Development of a polystyrene phantom for quality assurance of a Gamma Knife by Yona Choi, Kook Jin Chun, Jungbae Bahng, Sang Hyoun Choi, Gyu Seok Cho, Tae Hoon Kim, Hye Jeong Yang, Yeong Chan Seo, Hyun-Tai Chung

“…A polystyrene phantom was developed following the guidance of the International Atomic Energy Association (IAEA) for gamma knife (GK) quality assurance. Its…”
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Development of shielding evaluation and management program for O-ring type linear accelerators by Choi, Dong Hyeok, Ahn, So Hyun, Kim, Dong Wook, Choi, Sang Hyoun, Ahn, Woo Sang, Kim, Jihun, Kim, Jin Sung

“…The shielding parameters can vary depending on the geometrical structure of the linear accelerators (LINAC), treatment techniques, and beam energies. Recently,…”
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Author Correction: Development of shielding evaluation and management program for O-ring type linear accelerators by Choi, Dong Hyeok, Ahn, So Hyun, Kim, Dong Wook, Choi, Sang Hyoun, Ahn, Woo Sang, Kim, Jihun, Kim, Jin Sung

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Assessment of radio-activation using spectroscopy in medical linear accelerators by Kwon, Na Hye, Jang, Young Jae, Yu, Suah, Lee, Hanjin, Choi, Dong Hyeok, Ahn, So Hyun, Kim, Kum Bae, Kim, Jin Sung, Kim, Dong Wook, Choi, Sang Hyoun

“…In radiotherapy, when photon energy exceeding 8 MV is utilized, photoneutrons can activate the components within the gantry of the linear accelerator (linac)…”
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Development of a Real-Time Pixel Array-Type Detector for Ultrahigh Dose-Rate Beams by Jang, Young Jae, Yang, Tae Keun, Kim, Jeong Hwan, Jang, Hong Suk, Jeong, Jong Hwi, Kim, Kum Bae, Kim, Geun-Beom, Park, Seong Hee, Choi, Sang Hyoun

“…Although research into ultrahigh dose-rate (UHDR) radiation therapy is ongoing, there is a significant lack of experimental measurements for two-dimensional…”
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Design and Evaluation of a MEMS Magnetic Field Sensor-Based Respiratory Monitoring and Training System for Radiotherapy by Oh, Yoonjin, Jung, Young-Jin, Choi, Sang Hyoun, Kim, Dong Wook

“…The patient's respiratory pattern and reproducibility are important factors affecting the accuracy of radiotherapy for lung cancer or liver cancer cases…”
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Characterization of Tissue Equivalent Materials Using 3D Printing for Patient-Specific DQA in Radiation Therapy by Choi, Yona, Jang, Young Jae, Kim, Kum Bae, Bahng, Jungbae, Choi, Sang Hyoun

“…Three-dimensional printing technology has the advantage of facilitating the construction of complex three-dimensional shapes. For this reason, it is widely…”
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Plan optimization with L0-norm and group sparsity constraints for a new rotational, intensity-modulated brachytherapy for cervical cancer by Kim, Hojin, Lim, Young Kyung, Goh, Youngmoon, Jeong, Chiyoung, Hwang, Ui-Jung, Choi, Sang Hyoun, Cho, Byungchul, Kwak, Jungwon

“…The aim of this work is to build a framework that comprehends inverse planning procedure and plan optimization algorithm tailored to a novel directional beam…”
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Clinical Application of a Customized 3D-Printed Bolus in Radiation Therapy for Distal Extremities by Yu, Suah, Ahn, So Hyun, Choi, Sang Hyoun, Ahn, Woo Sang, Jung, In-Hye

“…In radiation therapy (RT) for skin cancer, tissue-equivalent substances called boluses are widely used to ensure the delivery of an adequate dose to the skin…”
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Feasibility of a 64-Channel Scintillation Fiber System for Real-Time Monitoring of Dwell Positions and Dwell Times of High-Dose-Rate Brachytherapy Sources by Kwon, Na Hye, Kim, Jinsung, Kim, Ju Hye, Choi, Sang Hyoun, Kim, Dong Wook

“…A 64-channel scintillation fiber-based real-time monitoring system (SFRMS) was developed and evaluated to verify the dwell position and dwell time of the…”
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Improvement of accuracy in radioactivity assessment of medical linear accelerator through self-absorption correction in HPGe detector by Yu, Suah, Kwon, Na Hye, Kim, Sang-Rok, Won, Young Jin, Kim, Kum Bae, Lee, Se Byeong, Baek, Cheol Ha, Choi, Sang Hyoun

“…Medical linear accelerators with an energy of 8 MV or higher are radiated owing to photonuclear reactions and neutron capture reactions. It is necessary to…”
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Feasibility study of normal tissue-sparing effect in proton minibeam radiation therapy: animal experiment by Kim, Dohyeon, Park, Kyeongyun, Lee, Seojin, Kim, Ju Sung, Kim, Sung Hun, Kim, Chankyu, Kim, Hak Soo, Jeong, Jong Hwi, Shin, Dongho, Lee, Se Byeong, Suh, Yang-Gun, Lim, Young Kyung, Hwang, Ui-Jung, Choi, Sang Hyoun

“…In the recent study of proton therapy, the expectation of the normal tissue-sparing effect of the proton minibeam radiation therapy (pMBRT) using a multi-slit…”
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Various Three-Dimensional Culture Methods and Cell Types for Exosome Production by Lee, Dong-Hyun, Yun, Dae Won, Kim, Yeong Hwan, Im, Gwang-Bum, Hyun, Jiyu, Park, Hyun Su, Bhang, Suk Ho, Choi, Sang Hyoun

“…Cell-based therapies have been used as promising treatments for several untreatable diseases. However, cell-based therapies have side effects such as…”
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Current status of disposal and measurement analysis of radioactive components in linear accelerators in Korea by Kwon, Na Hye, Shin, Dong Oh, Kim, Jinsung, Yoo, Jaeryong, Park, Min Seok, Kim, Kum Bae, Kim, Dong Wook, Choi, Sang Hyoun

“…When X-ray energy above 8 MV is used, photoneutrons are generated by the photonuclear reaction, which activates the components of linear accelerator (linac)…”
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