- Optimization of Parallel-Hole Collimator for Small Gamma Camera Based on Pixellated Crystal Array
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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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- Image Quality Evaluation of Digital X-Ray Detector Using Amorphous Selenium Layer and Amorphous Silicon TFT Array
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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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- Analysis of Accuracy of Apparent Activity According to Calibration Method for High Dose Rate Brachytherapy Source
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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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- Fabrication and Characterization of a One-dimensional Fiber-optic Dosimeter for Electron Beam Therapy Dosimetry
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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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- Coded Aperture Gamma Camera for Thyroid Imaging: Monte Carlo Simulation
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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 Ultrasound Phantom for Volume Calibration
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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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- Objective and Quantitative Evaluation of Image Quality Using Fuzzy Integral: Phantom Study
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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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- ROC Analysis of Simulated Chest Lesions for Computed Radiography and Digital Radiography at Various Tube Voltages
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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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- Analysis on the Decrease of Planning Target Volume in the Case of Lung Radiation Surgery with the Application of Respiratory Gated Radiotherpy Method
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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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- Development of Respiratory Signal Analysis Program for Accurate Phase Reassignment in 4D CT Reconstruction
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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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- Reviews of Radiation Protection and Shielding for Computed Tomography in Foreign Countries
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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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- Alteration Analysis of Normal Human Brain Metabolites with Variation of SENSE and NEX in 3T Multi Voxel Spectroscopy
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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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- A Comprehensive Computer Program for Monitor Unit Calculation and Beam Data Management: Independent Verification of Radiation Treatment Planning Systems
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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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- Evaluation of Magnetization Transfer Ratio Imaging by Phase Sensitive Method in Knee Joint
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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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- Geometric Calibration of Cone-beam CT System for Image Guided Proton Therapy
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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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