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Report on the External Audits Conducted by Korean Society of Medical Physics

Huh HD, Cho KH, Cho SJ, Choi SH, Kim DW, Hwang UJ, Kim KH, Min CK, Choi TJ, Oh YK, Lee SJ, Park D, Park SK, Ji YH

The aim of this work is to verify the self-quality assurances in medical institutions in Korea through the external audits by the group of experts and have a mutual discussion...
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Theoretical Investigation of Metal Artifact Reduction Based on Sinogram Normalization in Computed Tomography

Jeon H, Youn H, Nam J, Kim HK

Image quality of computed tomography (CT) is very vulnerable to metal artifacts. Recently, the thickness and background normalization techniques have been introduced. Since they provide flat sinograms, it is easy...
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Estimation of Secondary Scattered Dose from Intensity-modulated Radiotherapy for Liver Cancer Cases

Kim DW, Sung J, Lee H, Yoon M, Chung WK, Bae SH, Shin DO, Chung K, Lim YK, Shin D, Lee SB

We estimated secondary scattered and leakage doses for intensity-modulated radiotherapy (IMRT), volumetric arc therapy (VMAT) and tomotherapy (TOMO) in patients with liver cancer. Five liver patients were planned by IMRT,...
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Evaluation of Real-time Target Positioning Accuracy in Spinal Radiosurgery

Lee DJ

Stereotactic Radiosurgery require high accuracy and precision of patient positioning and target localization. We evaluate the real time positioning accuracy of isocenter using optic guided patient positioning system, ExacTrac (BrainLab,...
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A Dosimetric Comparision of IMRT and VMAT in Synchronous Bilateral Breast Cancer

Kim SJ, Youn SM, Kim SK

A study was performed comparing dosimetric characteristics of volumetric modulated arc and intensity modulated radiatio therapy on patients with bilateral breast cancer. For 5 patients, 3 plans were made for...
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Evaluation of Dose Reduction of Cardiac Exposure Using Deep-inspiration Breath Hold Technique in Left-sided Breast Radiotherapy

Jung JY, Kim MJ, Jung JH, Lee SR, Suh TS

Breast cancer is the leading cause of cancer death in women worldwide and the number of women breast cancer patient was increased continuously. Most of breast cancer patient has suffered...
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Convolution-Superposition Based IMRT Plan Study for the PTV Containing the Air Region: A Prostate Cancer Case

Kang SK, Yoon JW, Park S, Hwang T, Cheong KH, Han T, Kim H, Lee MY, Kim KJ, Bae H

In prostate IMRT planning, the planning target volume (PTV), extended from a clinical target volume (CTV), often contains an overlap air volume from the rectum, which poses a problem inoptimization...
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Differences in Target Volume Delineation Using Typical Radiosurgery Planning System

Han SC, Lee DJ

Correct target volume delineation is an important part of radiosurgery treatment planning process. We designed head phantom and performed target delineation to evaluate the volume differences due to radiosurgery treatment...
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Development of DICOM Convert Program for the Geant4 Monte Carlo Simulation of the Radiotherapy

Kang J, Lee DJ

The DICOM converter program of the Geant4 Monte Carlo simulation code for the application of radiotherapy was developed. We analysis the header part of the DICOM file and find various...
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The Comparative Analysis of External Dose Reconstruction in EPID and Internal Dose Measurement Using Monte Carlo Simulation

Jung JY, Yoon DK, Suh TS

The purpose of this study is to evaluate and analyze the relationship between the external radiation dose reconstruction which is transmitted from the patient who receives radiation treatment through electronic...
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Analysis of Acquisition Parameters That Caused Artifacts in Four-dimensional (4D) CT Images of Targets Undergoing Regular Motion

Sheen H, Han Y, Shin E

The aim of this study was to clarify the impacts of acquisition parameters on artifacts in four-dimensional computed tomography (4D CT) images, such as the partial volume effect (PVE), partial...
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The Feasibility Study of MRI-based Radiotherapy Treatment Planning Using Look Up Table

Kim SW, Shin HJ, Lee YK, Seo JH, Lee GW, Park HW, Lee JC, Kim AR, Kim JN, Kim MH, Kay CS, Jang HS, Kang YN

In the intracranial regions, an accurate delineation of the target volume has been difficult with only the CT data due to poor soft tissue contrast of CT images. Therefore, the...
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A Smart Setup for Craniospinal Irradiation

Peterson J, Vallow LA, Kim S, Casale HE, Tzou KS

Our purpose is to present a novel technique for delivering craniospinal irradiation in the supine position using a perfect match, field-in-field (FIF) intrafractional feathering, and simple forward-optimization technique. To achieve...
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Visibility of Internal Target Volume of Dynamic Tumors in Free-breathing Cone-beam Computed Tomography for Image Guided Radiation Therapy

Kauweloa K, Park JC, Sandhu A, Pawlicki T, Song B, Song WY

Respiratory-induced dynamic tumors render free-breathing cone-beam computed tomography (FBCBCT) images with motion artifacts complicating the task of quantifying the internal target volume (ITV). The purpose of this paper is to...
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Review on the Pre-treatment Quality Assurance for Intensity Modulated Radiation Therapy

Han Y

This review paper deals with the current statues of pre-treatment quality assurance conducted for Intensity modulated radiation therapy. Focusing on the issues relevant to two-dimensional verification of absorbed dose distribution,...
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Practical Considerations in Preparing an Institutional Procedure of Image Guided Radiation Therapy

Yi BY

Recent developments of image guided radiation therapy (IGRT), especially the On Board Imaging (OBI) system and the cone beam CT (CBCT), enable the radiation treatment more accurate and reliable. IGRT...
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