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Isocenter Check and QA of Tactic Radiosurgery Devices Using EPID

Shin KC, Choi SG, Kim JK, Jeong DH

The Winston Lutz test, which checks the accuracy of the isocenter for stereotactic radiosurgery (SRS), was performed with the commercial electronic portal imaging device (EPID). The usual Winston Lutz test...
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Discrepancies between Calculated and Delivered Dose Distributions of Respiratory Gated IMRT Fields according to the Target Motion Ranges for Lung and Liver Cancer Patients

Kim Y, Lim S, Choi JH, Ma SY, Jeung TS, Ro TI

To see the discrepancies between the calculated and the delivered dose distribution of IMRT fields for respiratory-induced moving target according to the motion ranges. Four IMRT plans in which there...
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Development and Utility Evaluation of Portable Respiration Training Device for Image-guided Stereotactic Body Radiation Therapy (SBRT)

Hwang SB, Park MK, Park SW, Cho YR, Lee DH, Jung HJ, Ji YH, Kwon SI

This study developed a portable respiratory training device to improve breathing stability, which is an important element in using the CyberKnife Synchrony respiratory tracking device, one of the typical Stereotactic...
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The Influence of E-beam Irradiation on POLY(ETHER-BLOCK-AMIDE) (PEBA, Pebax)

Shin S, Choi S

Medical polymers require sterilization and must be able to maintain material properties for a specified shelf life. Sterilization can be achieved by using gamma or e-beam exposure. In this study,...
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Qualitative Evaluation of 2D Dosimetry System for Helical Tomotherapy

Ma SY, Jeung TS, Shim JB, Lim S

The purpose of this study is to see the feasibility of the newly developed 2D dosimetry system using phosphor screen for helical tomotherapy. The cylindrical water phantom was fabricated with...
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Characteristics of Photon Beam through a Handmade Build-Up Modifier as a Substitute of a Bolus

Kim SJ, Lee SJ, Moon SH, Seol KH, Lee JE

We evaluated the effect of scatter on a build-up region based on the measured percent depth dose (PDD) of high-energy photon beams that penetrated a handmade build-up modifier (BM) as...
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Study on Generator Control for a Small X-Ray Tube

Lee S, Ji YS, Choi SG, Lee R

The purpose of this study is to develope a control system for a small X-ray tube generator and investigate control methods for the X-ray generator. The small X-ray tube was...
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Dosimetric Verifications of the Output Factors in the Small Field Less Than 3 cm2 Using the Gafchromic EBT2 Films and the Various Detectors

Oh SA, Yea JW, Lee R, Park HB, Kim SK

The small field dosimetry is very important in modern radiotherapy because it has been frequently used to treat the tumor with high dose hypo-fractionated radiotherapy or high dose single fraction...
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Dosimetric Advantages of the Field-in-field Plan Compared with the Tangential Wedged Beams Plan for Whole-breast Irradiation

Kim S, Choi Y

The purpose of this study is to evaluate the dosimetric outcome of the field-in-field (FIF) plans compared with tangential wedged beams (TWB) plans for whole breast irradiation of breast cancer...
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Radiotherapy Incidents Analysis Based on ROSIS: Tendency and Frequency

Koo J, Yoon M, Chung WK, Kim DW

In this study, we examine the trends and types of incidents frequently occur during radiation therapy by using the data from the radiation oncology safety information system (ROSIS), according to...
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A Study of Various Filter Setups with FBP Reconstruction for Digital Breast Tomosynthesis

Lee HH, Kim YS, Lee Y, Choi S, Lee S, Park HS, Kim HJ, Choi JG, Choi YW

Recently, digital breast tomosynthesis (DBT) has been investigated to overcome the limitation of conventional mammography for overlapping anatomical structures and high patient dose with cone-beam computed tomography (CBCT). However incomplete...
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Feasibility Study of the microDiamond Detector for Measurement of Small Field Photon Beam

Lee CY, Kim WC, Kim HJ, Ji YH, Kim KB, Lee SH, Min CK, Jo GH, Shin DO, Kim SH, Huh HD

The dosimetry of very small fields is challenging for several reasons including a lack of lateral electronic equilibrium, large dose gradients, and the size of detector in respect to the...
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Development of Quality Assurance Software for PRESAGE(REU) Gel Dosimetry

Cho W, Lee J, Kim HS, Wu HG

The aim of this study is to develop a new software tool for 3D dose verification using PRESAGE(REU) Gel dosimeter. The tool included following functions: importing 3D doses from treatment...
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Comparison of Anisotropic Analytic Algorithm Plan and Acuros XB Plan for Lung Stereotactic Ablative Radiotherapy Using Flattening Filter-Free Beams

Chung JB, Eom KY, Kim IA, Kim JS, Lee JW, Hong S, Kim YL, Park BM, Kang SW, Suh TS

This study investigated the dosimetric effects of different dose calculation algorithm for lung stereotactic ablative radiotherapy (SABR) using flattening filter-free (FFF) beams. A total of 10 patients with lung cancer...
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Use of Flattening Filter Free Photon Beams for Off-axis Targets in Conformal Arc Stereotactic Body Radiation Therapy

Smith A, Kim S, Serago C, Hintenlang K, Ko S, Vallow L, Peterson J, Hintenlang D, Heckman M, Buskirk S

Dynamic conformal arc therapy (DCAT) and flattening-filter-free (FFF) beams are commonly adopted for efficient conformal dose delivery in stereotactic body radiation therapy (SBRT). Off-axis geometry (OAG) may be necessary to...
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