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by Choi, Y and Kwak, J and Jeong, C and Ahn, S and Lee, S and Cho, B
Medical Physics, ISSN 0094-2405, 06/2016, Volume 43, Issue 6, pp. 3568 - 3569
Purpose: To compare the commissioned beam data for one flattening filter photon mode (6 MV) and two flattening filter-free (FFF) photon modes (6 and 10 MV-FFF)... 
Field size | Ionization chambers | Photons | HEAD | 07 ISOTOPES AND RADIATION SOURCES | BEAM PROFILES | DOSIMETRY | DEPTH DOSE DISTRIBUTIONS | IONIZATION CHAMBERS
Journal Article
by Jeong, C and Kwak, J and Ahn, S and Kim, J and Park, J and Yoon, S and Cho, B
Medical Physics, ISSN 0094-2405, 06/2015, Volume 42, Issue 6Part14, pp. 3372 - 3372
Purpose: A multi-leaf collimator (MLC) based dynamic wedge (MDW), which provide similar dose profile of physical wedge (PW) along x-jaw direction while... 
X‐ray scattering | Out of field scattering | Multileaf collimators | Dynamic wedges | Physical wedges | Liver | FORMATES | MAMMARY GLANDS | RECTUM | BEAM MONITORS | LIVER | RADIOLOGY AND NUCLEAR MEDICINE | RADIATION DOSES | COLLIMATORS | 60 APPLIED LIFE SCIENCES
Journal Article
by Cho, H and Hong, C and Doh, I and Ahn, B
Medical Physics, ISSN 0094-2405, 06/2016, Volume 43, Issue 6, pp. 3391 - 3391
Purpose: To investigate the potential of a newly developed modular phantom with image quality test structure for MRI quality control. Methods: The modular... 
Image scanners | Medical image noise | Quality assurance | Magnetic resonance imaging | Data acquisition | Medical image spatial resolution | Magnetoresistance | Spatial resolution
Journal Article
by Ahn, S and Lee, N and Shin, S and Choi, C and Han, Y and Park, H and Choi, D and Lim, D
Medical Physics, ISSN 0094-2405, 06/2016, Volume 43, Issue 6, pp. 3616 - 3616
Journal Article
Medical Physics, ISSN 0094-2405, 06/2016, Volume 43, Issue 6, pp. 3387 - 3387
Journal Article
Medical Physics, ISSN 0094-2405, 06/2016, Volume 43, Issue 6, pp. 3454 - 3454
Journal Article
by Cho, S and Ahn, S and Kim, J and Park, K and Choi, W and Lee, H and Lee, E and Yoon, J and Keum, K
Medical Physics, ISSN 0094-2405, 06/2016, Volume 43, Issue 6, pp. 3530 - 3530
Purpose: To evaluate the sensitivity of gamma criteria for patient-specific volumetric modulated arc therapy(VMAT) quality assurance of the Delta4 dosimetry... 
Quality assurance | Process monitoring and control | Statistical analysis | Dosimetry | Physics education | QUALITY ASSURANCE | SENSITIVITY | PROCESS CONTROL | RADIOTHERAPY | 60 APPLIED LIFE SCIENCES | DOSIMETRY | RESEARCH PROGRAMS
Journal Article
by Yoon, K and Cho, B and Kwak, J and Lee, D and Kwon, D and Ahn, S and Lee, S and Kim, C and Roh, S and Cho, Y
Medical Physics, ISSN 0094-2405, 06/2016, Volume 43, Issue 6, pp. 3371 - 3371
Purpose: In pursuit of high precision in target localization and steeper dose fall-off in stereotactic radiosurgery, we investigated the impact of optimizing... 
Brain | Data analysis | Data sets | Radiosurgery | Medical treatment planning | Optimization | Cancer
Journal Article
by Hong, C and Ju, S and Ahn, Y
Medical Physics, ISSN 0094-2405, 06/2015, Volume 42, Issue 6Part21, pp. 3467 - 3467
Purpose: To compare normal lung-sparing capabilities of three advanced radiation therapy techniques for locally advanced non-small cell lung cancer (LA-NSCLC).... 
Heart | Intensity modulated radiation therapy | Lungs | Computed tomography | Dosimetry | Tissue characterization | Cancer | HEART | SPINAL CORD | NEOPLASMS | RADIATION PROTECTION AND DOSIMETRY | GY RANGE 01-10 | LUNGS | RADIOLOGY AND NUCLEAR MEDICINE | RADIATION DOSES | RADIOTHERAPY | COMPUTERIZED TOMOGRAPHY | DOSIMETRY | GY RANGE 10-100
Journal Article
by Yoon, K and Kwak, J and Cho, B and Lee, D and Ahn, S
Medical Physics, ISSN 0094-2405, 06/2014, Volume 41, Issue 6Part12, pp. 246 - 246
Purpose: The aim of this study was to develop a new 3 dimensional dosimetry system to verify the dosimetric accuracy of Leksell Gamma Knife-Perfexion™ (LGK)... 
Charge coupled devices | Collimators | Cameras | Dosimetry | Phosphors | Backscattering | INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY | HEAD | CAMERAS | RADIATION DOSES | 60 APPLIED LIFE SCIENCES | ACCURACY | CHARGE-COUPLED DEVICES | PMMA | IMAGES | ELECTRIC MOTORS | PHANTOMS | COLLIMATORS | DOSIMETRY
Journal Article
by Cheon, W and Cho, J and Ahn, S and Han, Y and Choi, D
Medical Physics, ISSN 0094-2405, 06/2015, Volume 42, Issue 6Part21, pp. 3466 - 3467
Purpose: To accommodate geometrically accurate patient positioning, a robotic couch that is capable of 6-degrees of freedom has been introduced. However,... 
Infrared detectors | Data analysis | Quality assurance | Computer software | Cameras | Motion detection | Calibration | Matrix methods | Robotics | Rotation measurement | CALIBRATION | BEAM POSITION | CAMERAS | QUALITY ASSURANCE | PARTICLE TRACKS | RADIOLOGY AND NUCLEAR MEDICINE | COMPUTER CODES | POSITIONING | RADIOTHERAPY | COORDINATES | ACCURACY
Journal Article
by Jin, H and Ahn, C and Kuo, M and Kim, J
Medical Physics, ISSN 0094-2405, 06/2015, Volume 42, Issue 6Part11, pp. 3326 - 3326
Journal Article
by Chung, K and Kim, J and Shin, J and Han, Y and Ju, S and Hong, C and Kim, D and Kim, H and Shin, E and Ahn, S and Chung, S and Choi, D
Medical Physics, ISSN 0094-2405, 06/2014, Volume 41, Issue 6Part15, pp. 278 - 278
Purpose: To expedite and cross-check the commissioning of the proton therapy nozzles at Samsung Medical Center using TOPAS. Methods: We have two different... 
Protons | Monte Carlo methods | Proton therapy | Multileaf collimators | Biomedical modeling | Magnets | MONTE CARLO METHOD | PROTON BEAMS | 07 ISOTOPES AND RADIATION SOURCES | RADIOTHERAPY | BRAGG CURVE | COMPUTERIZED SIMULATION | DEPTH DOSE DISTRIBUTIONS | MEDICAL ESTABLISHMENTS
Journal Article
by Ju, S and Hong, C and Kim, M and Chung, K and Kim, J and Han, Y and Ahn, S and Chung, S and Shin, E and Shin, J and Kim, H and Kim, D and Choi, D
Medical Physics, ISSN 0094-2405, 06/2014, Volume 41, Issue 6Part14, pp. 267 - 267
Purpose: The aim of this study was to investigate the gantry angle dependency of the multileaf collimator (MLC) leaf position error. Methods: An automatic MLC... 
Image analysis | Quality assurance | Medical imaging | Error analysis | Multileaf collimators | Image guided radiation therapy | Linear accelerators | LINEAR ACCELERATORS | ERRORS | QUALITY ASSURANCE | IMAGES | RECOMMENDATIONS | COMPUTER CODES | 07 ISOTOPES AND RADIATION SOURCES | COLLIMATORS | 60 APPLIED LIFE SCIENCES
Journal Article
by Ahn, S and Chung, K and Han, Y and Park, H
Medical Physics, ISSN 0094-2405, 06/2016, Volume 43, Issue 6, pp. 3616 - 3616
Purpose: Injected gold nano particles (GNPs) to a body for dose enhancement are known to form in the tumorcell cluster morphology. We investigated the... 
Gold | Monte Carlo methods | Radiation detectors | Surface morphology | Photons | Dosimetry | Curve fitting | DISTANCE | MONTE CARLO METHOD | PARTICLES | BIOLOGICAL EFFECTS | RADIATION PROTECTION AND DOSIMETRY | PHOTONS | PHANTOMS | RADIATION DOSES | 60 APPLIED LIFE SCIENCES | MORPHOLOGY | COMPUTERIZED SIMULATION | SURVIVAL CURVES
Journal Article
Medical Physics, ISSN 0094-2405, 06/2015, Volume 42, Issue 6Part21, pp. 3466 - 3466
Purpose: To evaluate the shielding wall design to protect patients, staff and member of the general public for secondary neutron using a simply analytic... 
Protons | Neutrons | Monte Carlo methods | Dosimetry | Proton therapy | PATIENTS | SHIELDING | DOSE EQUIVALENTS | RADIATION PROTECTION AND DOSIMETRY | EVALUATION | PROTON BEAMS | MEDICAL PERSONNEL | RADIATION PROTECTION | SIMULATION | MEDICAL ESTABLISHMENTS | RADIOLOGY AND NUCLEAR MEDICINE | RADIOTHERAPY | NEUTRON BEAMS
Journal Article
by Hong, C and Cho, H and Lee, D and Ahn, B
Medical Physics, ISSN 0094-2405, 06/2014, Volume 41, Issue 6Part5, pp. 138 - 138
Journal Article
Medical Physics, ISSN 0094-2405, 06/2013, Volume 40, Issue 6, pp. 108 - 108
Purpose: Using CBCT to detect variations in proton beam path prior to treatment is an important step in the quality assurance of proton therapy. However, the... 
Protons | Collisional energy loss | Image registration | Medical image quality | Quality assurance | Cone beam computed tomography | Medical imaging | Computed tomography | Ray tracing | Proton therapy
Conference Proceeding
by Liu, H and Liang, X and Kalbasi, A and Lin, A and Ahn, P and Both, S
Medical Physics, ISSN 0094-2405, 06/2014, Volume 41, Issue 6Part17, pp. 317 - 317
Purpose: Advanced radiotherapy (RT) techniques such as proton pencil beam scanning (PBS) and photon-based volumetric modulated arc therapy (VMAT) have... 
Protons | Photons | Dosimetry | Computed tomography | Cancer | REVIEWS | HEAD | PATIENTS | RADIATION DOSE DISTRIBUTIONS | ALIGNMENT | NEOPLASMS | RADIATION DOSES | NECK | RADIOTHERAPY | 60 APPLIED LIFE SCIENCES | CAT SCANNING | VERIFICATION
Journal Article
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