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Analysis of Accuracy of Apparent Activity According to Calibration Method for High Dose Rate Brachytherapy Source

Huh HD, Choi JH, Choi SH, Kim SH, Kim WC, Kim HJ, Lee R, Kim KB, Hong SE, Shin DO

  • KMID: 2243974
  • Korean J Med Phys.
  • 2008 Dec;19(4):305-312.
The aim of this study is to introduce the accuracy of Ir-192 source's apparent activity using the well-type chamber and the Farmer-type ionization chamber in the high dose rate brachytherapy....
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ROC Analysis of Simulated Chest Lesions for Computed Radiography and Digital Radiography at Various Tube Voltages

Cho HM, Kim HJ, Lee CL, Jung JY, Park HS

  • KMID: 2243973
  • Korean J Med Phys.
  • 2008 Dec;19(4):298-304.
Current digital radiographic systems are rapidly growing in clinical applications. The purpose of this study was to evaluate the diagnostic performance of computed radiography (CR) and digital radiography (DR) at...
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Optimization of Parallel-Hole Collimator for Small Gamma Camera Based on Pixellated Crystal Array

Chung YH, Beak CH, Lee SJ, Park JH

  • KMID: 2243972
  • Korean J Med Phys.
  • 2008 Dec;19(4):291-297.
The purpose of this study is to optimize a parallel-hole collimator for small gamma camera having the pixellated crystal array and evaluate the effect of crystal-collimator misalignment on the image...
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Fabrication and Characterization of a One-dimensional Fiber-optic Dosimeter for Electron Beam Therapy Dosimetry

Jang KW, Cho DH, Shin SH, Yoo WJ, Jun JH, Lee B, Moon JH, Park BG

  • KMID: 2243971
  • Korean J Med Phys.
  • 2008 Dec;19(4):285-290.
In this study, we have fabricated a one-dimensional fiber-optic dosimeter for electron beam therapy dosimetry. Each fiber-optic dosimeter has an organic scintillator with a plastic optical fiber and it is...
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Reviews of Radiation Protection and Shielding for Computed Tomography in Foreign Countries

Jahng GH, Yang DM, Sung DW, Lee KY, Kim HJ

  • KMID: 2243970
  • Korean J Med Phys.
  • 2008 Dec;19(4):276-284.
A computed tomography (CT) is a powerful system for the effectively fast and accurate diagnosis. The CT system, therefore, has used substantially and developed for improving the performance over the...
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Evaluation of Magnetization Transfer Ratio Imaging by Phase Sensitive Method in Knee Joint

Yoon MH, Seung MS, Choe BY

  • KMID: 2243969
  • Korean J Med Phys.
  • 2008 Dec;19(4):269-275.
Although MR imaging is generally applicable to depict knee joint deterioration it, is sometimes occurred to mis-read and mis-diagnose the common knee joint diseases. In this study, we employed magnetization...
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Analysis on the Decrease of Planning Target Volume in the Case of Lung Radiation Surgery with the Application of Respiratory Gated Radiotherpy Method

Song JY, Nah BS, Chung WK, Ahn SJ, Nam TK, Yoon MS, Jung JU

  • KMID: 2243968
  • Korean J Med Phys.
  • 2008 Dec;19(4):263-268.
The application of a respiratory gated radiotherpy method to the lung radiation surgery was evaluated compared with the conventional method in which the whole tumor motion range is considered in...
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Alteration Analysis of Normal Human Brain Metabolites with Variation of SENSE and NEX in 3T Multi Voxel Spectroscopy

Seong YH, Rhim JD, Lee JH, Cho SB, Woo DC, Choe BY

  • KMID: 2243967
  • Korean J Med Phys.
  • 2008 Dec;19(4):256-262.
To evaluate the metabolic changes in normal adult brains due to alterations SENSE and NEX (number of excitation) by multi voxel MR Spectroscopy at 3.0 Tesla. The study group was...
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Coded Aperture Gamma Camera for Thyroid Imaging: Monte Carlo Simulation

Beak CH, Lee SJ, Chung YH

  • KMID: 2243966
  • Korean J Med Phys.
  • 2008 Dec;19(4):247-255.
A coded aperture camera has been developed to improve the signal-to-noise ratio (SNR) while keeping the spatial resolution of a pinhole gamma camera. The purpose of this study was to...
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Development of Respiratory Signal Analysis Program for Accurate Phase Reassignment in 4D CT Reconstruction

Park HJ, Jung WG, Yoon JW, Song JY, Suh TS

  • KMID: 2243965
  • Korean J Med Phys.
  • 2008 Dec;19(4):241-246.
Patient's respiration can have an effect on movement of tumor range and peripheral organs. Therefore, the respiratory signal was acquired by relation between external markers and movement of patient's abdomen...
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A Comprehensive Computer Program for Monitor Unit Calculation and Beam Data Management: Independent Verification of Radiation Treatment Planning Systems

Kim HJ, Park YK, Park JM, Choi CH, Kim JI, Lee SW, Oh HJ, Lim C, Kim IH, Ye SJ

  • KMID: 2243964
  • Korean J Med Phys.
  • 2008 Dec;19(4):231-240.
We developed a user-friendly program to independently verify monitor units (MUs) calculated by radiation treatment planning systems (RTPS), as well as to manage beam database in clinic. The off-axis factor,...
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Development of Ultrasound Phantom for Volume Calibration

Kim HY, Lee JH, Lee KJ, Suh H, Lee R

  • KMID: 2243963
  • Korean J Med Phys.
  • 2008 Dec;19(4):227-230.
The purpose of this study was to design and construct an ultrasound phantom for volume calibration and evaluate the volume measurement accuracy of a 2 dimensional ultrasonic system. Ultrasound phantom...
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Image Quality Evaluation of Digital X-Ray Detector Using Amorphous Selenium Layer and Amorphous Silicon TFT Array

Kim CW, Yoon JK, Kim JH

  • KMID: 2243962
  • Korean J Med Phys.
  • 2008 Dec;19(4):219-226.
In this study, we have conducted characterization of imaging performance for a flat panel digital X-ray detector using amorphous Selenium and a-Si TFT which was developed by the authors. The...
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Geometric Calibration of Cone-beam CT System for Image Guided Proton Therapy

Kim JS, Cho MK, Cho YB, Youn HB, Kim HK, Yoon M, Shin D, Lee S, Lee RN, Park SY, Cho KH

  • KMID: 2243961
  • Korean J Med Phys.
  • 2008 Dec;19(4):209-218.
According to improved radiation therapy technology such as IMRT and proton therapy, the accuracy of patient alignment system is more emphasized and IGRT is dominated research field in radiation oncology....
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Objective and Quantitative Evaluation of Image Quality Using Fuzzy Integral: Phantom Study

Kim SH, Suh TS, Choe BY, Lee HK

  • KMID: 2243960
  • Korean J Med Phys.
  • 2008 Dec;19(4):201-208.
Physical evaluations provide the basis for an objective and quantitative analysis of the image quality. Nonetheless, there are limitations in using physical evaluations to judge the utility of the image...
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