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Suggestion for Comprehensive Quality Assurance of Medical Linear Accelerator in Korea

Choi SH, Park DW, Kim KB, Kim DW, Lee J, Shin DO

American Association of Physicists in Medicine (AAPM) Published Task Group 40 report which includes recommendations for comprehensive quality assurance (QA) for medical linear accelerator in 1994 and TG-142 report for...
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Evaluation of Set-up Accuracy for Frame-based and Frameless Lung Stereotactic Body Radiation Therapy

Ji Y, Chang KH, Cho B, Kwak J, Song SY, Choi EK, Lee SW

The purpose of this study was to evaluate the set up accuracy using stereotactic body frame and frameless immobilizer for lung stereotactic body radiation therapy (SBRT). For total 40 lung...
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Evaluation of Fabricated Semiconductor Sensor for Verification of gamma-ray Distribution in Brachytherapy

Park JE, Kim KT, Choi WH, Lee H, Cho SJ, Ahn SH, Kim JY, Song YK, Kim KB, Huh HD, Park SK

In radiation therapy fields, a brachytherapy is a treatment that kills lesion of cells by inserting a radioisotope that keeps emitting radiation into the body. We currently verify the consistency...
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The Study of High-functioning Electrodeposition Technology That Pearl-like Feeling Expressed for Medical Devices for Smart Health

Chang HG, Lee IB

Recently, medical devices for a smart health development and dissemination are becoming increasingly frequent use of devices and their's thermal stability, durability, the external splendors are required. Industrial demand for...
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The Dose and Risk Reduction from Adoption of Automatic mA Control in 4D CT Scans

Ko YE, Je HU, Hwang Y, Park SH

In this study, the reduction of dose and risk was evaluated from using automatic mA control in 4D CT scan of patients whose organ movement was considered for gated radiotherapy....
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Feasibility of Automated Detection of Inter-fractional Deviation in Patient Positioning Using Structural Similarity Index: Preliminary Results

Youn H, Jeon H, Lee J, Lee J, Nam J, Park D, Kim W, Ki Y, Kim D

The modern radiotherapy technique which delivers a large amount of dose to patients asks to confirm the positions of patients or tumors more accurately by using X-ray projection images of...
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Development of Manual Multi-Leaf Collimator for Proton Therapy in National Cancer Center

Lee N, Kim TY, Kang DY, Choi JH, Jeong JH, Shin D, Lim YK, Park J, Kim TH, Lee SB

Multi-leaf collimator (MLC) systems are frequently used to deliver photon-based radiation, and allow conformal shaping of treatment beams. Many proton beam centers currently make use of aperture and snout systems,...
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Feasibility Study for Development of Transit Dosimetry Based Patient Dose Verification System Using the Glass Dosimeter

Jeong S, Yoon M, Kim DW, Chung WK, Chung M, Choi SH

As radiation therapy is one of three major cancer treatment methods, many cancer patients get radiation therapy. To exposure as much radiation to cancer while normal tissues near tumor get...
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Comparison of Dosimetric Parameters of Patient with Large and Pendulous Breast Receiving Breast Radiotherapy in the Prone versus Supine Position

Moon SY, Yoon M, Chung WK, Chung M, Shin DO, Kim DW

The purpose of this study is to analyze dosimetric parameters of patient with large and pendulous breast receiving breast radiotherapy in the prone versus supine position. The patient underwent computed...
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Response Evaluation after Stereotactic Ablative Radiotherapy for Lung Cancer

Choi JH

We retrospectively reviewed lung cancer patients who were treated with stereotactic ablative radiotherapy (SABR). We investigated the value of response evaluation after treatment by measuring the volume change of tumors...
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Evaluation of Dosimetric Characteristics of a Double-focused Dynamic Micro-Multileaf Collimator (DMLC)

Kim AR, Seo JH, Shin HJ, Park HW, Lee KW, Lee JC, Kim SW, Kim JN, Park H, Lee HK, Kang YN

Double-focused micro-Multileaf Collimator (microMLC) is able to create radiation fields having sharper dose gradients at the field edges than common MLC. Therefore, microMLC has been used for the stereotactic radio-surgery...
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Experimental Study for Phase-contrast X-ray Imaging Based on a Single Antiscatter Grid and a Polychromatic X-ray Source

Park Y, Cho H, Lim H, Je U, Park C, Cho H, Kim K, Kim G, Park S

In this work, we performed a proof-of-concept experiment for phase-contrast x-ray imaging (PCXI) based on a single antiscatter grid and a polychromatic x-ray source. We established a table-top setup which...
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Effect of Low Magnetic Field on Dose Distribution in the Partial-Breast Irradiation

Kim JI, Park SY, Lee YH, Shin KH, Wu HG, Park JM

The aim of this study is to investigate the effect of low magnetic field on dose distribution in the partial-breast irradiation (PBI). Eleven patients with an invasive early-stage breast carcinoma...
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Evaluation of 3DVH Software for the Patient Dose Analysis in TomoTherapy

Song JY, Kim YH, Jeong JU, Yoon MS, Ahn SJ, Chung WK, Nam TK

The new function of 3DVH software for dose calculation inside the patient undergoing TomoTherapy treatment by applying the measured data obtained by ArcCHECK was recently released. In this study, the...
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Commissioning Experience of Tri-Cobalt-60 MRI-guided Radiation Therapy System

Park JM, Park SY, Wu HG, Kim JI

The aim of this study is to present commissioning results of the ViewRay system. We verified safety functions of the ViewRay system. For imaging system, we acquired signal to noise...
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