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Report of Present Status of Calibration for Domestic Radiation Measurements Instruments

Lim S, Choi J, An S, Cho KH, Lee SH, Lee R, Cho SJ

Periodical calibrations of radiation detectors are important for accurate quality assurance of therapeutic linac. The measuring instruments such as ion-chamber, thermometer, barometer, and survey meter should be calibrated periodically. Period...
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Development of Dual-mode Signal Processing Module for Multi-slit Prompt-gamma Camera

Park JH, Lee HR, Kim SH, Kim CH, Shin DH, Lee SB, Jeong JH

In proton therapy, in vivo proton beam range verification is very important to deliver conformal dose to the target volume and minimize unnecessary dose to normal tissue. For this purpose,...
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Evaluation of Radiation Dose for Dual Energy CBCT Using Multi-Grid Device

Ju EB, Ahn SH, Cho SJ, Keum KC, Lee R

The paper discusses radiation dose of dual energy CT on which copper modulation layer, is mounted in order to improve diagnostic performance of the dual energy CT. The radiation dose...
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Measurement of Energy Parameters for Electron Gun Heater Currents and Output Dose Rate for Electron Beams from a Prototype Linac

Lim H, Lee M, Kim MY, Yi J, Lee M, Kang SK, Rhee DJ, Jeong DH

The dosimetric characteristics were experimentally evaluated for electron beams from the prototype linac developed for radiotherapy units. This paper focuses on the electron beam output and energy variations as a...
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Evaluating the Dosimetric Characteristics of Radiation Therapies according to Head Elevation Angle for Head and Neck Tumors

Cheon GS, Kang SH, Kim DS, Kim TH, Suh TS

Since the head and neck region is densely located with organs at risk (OAR), OAR-sparing is an important issue in the treatment of head and neck cancers. This study—in which...
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Analysis of Beam Hardening of Modulation Layers for Dual Energy Cone-beam CT

Ahn S, Cho SJ, Keum KC, Choi SG, Lee R

Dual energy cone-beam CT can distinguish two materials with different atomic compositions. The principle of dual energy cone-beam CT based on modulation layer is that higher energy spectrum can be...
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Compressed-sensing (CS)-based Image Deblurring Scheme with a Total Variation Regularization Penalty for Improving Image Characteristics in Digital Tomosynthesis (DTS)

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

In this work, we considered a compressed-sensing (CS)-based image deblurring scheme with a total-variation (TV) regularization penalty for improving image characteristics in digital tomosynthesis (DTS). We implemented the proposed image...
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