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Estimation of CyberKnife Respiratory Tracking System Using Moving Phantom

Seo JH, Kang YN, Jang JS, Shin HJ, Jung JY, Choi BO, Choi IB, Lee DJ, Kwon SI, Lim JS

  • KMID: 1989089
  • Korean J Med Phys.
  • 2009 Dec;20(4):324-330.
In this study, we evaluated accuracy and usefulness of CyberKnife Respiratory Tracking System (SynchronyTM, Accuray, USA) about a moving during stereotactic radiosurgery. For this study, we used moving phantom that...
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The Study on the Use of a Cylindrical Ionization Chamber for the Calibration of a 6 MeV Electron Beam

Kim SH, Huh H, Choi SH, Choi J, Kim HJ, Lim C, Shin DO

  • KMID: 1989088
  • Korean J Med Phys.
  • 2009 Dec;20(4):317-323.
The standard dosimetry systems based on an absorbed dose to water recommend to use a planeparallel chamber for the calibration of such a low-megavoltage electron beam as a nominal energy...
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Evaluation the Output Dose of Linear Accelerator Photon Beams by Blind Test with Dose Characteristics of LiF:Mg,Cu,P TLD

Choi TJ, Lee HJ, Yie JW, Oh YG, Kim JH, Kim OB

  • KMID: 1989087
  • Korean J Med Phys.
  • 2009 Dec;20(4):308-316.
To achieve the accurate evaluation of given absorbed dose from output dose of linear accelerator photon beam through investigate the characteristics of LiF:Mg,Cu,P TLD powder. This experimental TL phosphor is...
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MR T2 Map Technique: How to Assess Changes in Cartilage of Patients with Osteoarthritis of the Knee

Cho JH, Park CS, Lee SY, Kim BH

  • KMID: 1989086
  • Korean J Med Phys.
  • 2009 Dec;20(4):298-307.
By using the MR T2 map technique, this study intends, first, to measure the change of T2 values of cartilage between healthy people and patients with osteoarthritis and, second, to...
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Study on the Small Fields Dosimetry for High Energy Photon-based Radiation Therapy

Jeong HS, Han Y, Kum O, Kim CH

  • KMID: 1989085
  • Korean J Med Phys.
  • 2009 Dec;20(4):290-297.
In case of radiation treatment using small field high-energy photon beams, an accurate dosimetry is a challenging task because of dosimetrically unfavorable phenomena such as dramatic changes of the dose...
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Effects of the Variability of Individual Data on the Group Results; an Acupuncture Study Using fMRI

Bae SI, Jahng GH, Ryu CW, Lim S

  • KMID: 1989084
  • Korean J Med Phys.
  • 2009 Dec;20(4):277-289.
Recently, functional MRI has been used to investigate the neurobiological mechanisms of acupuncture and the specificity of acupoint. The group data tend to be regarded as more important than the...
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Estimation of Jaw and MLC Transmission Factor Obtained by the Auto-modeling Process in the Pinnacle3 Treatment Planning System

Hwang T, Kang SK, Cheong KH, Park S, Lee M, Kim KJ, Oh DH, Bae H, Suh TS

  • KMID: 1989083
  • Korean J Med Phys.
  • 2009 Dec;20(4):269-276.
Radiation treatment techniques using photon beam such as three-dimensional conformal radiation therapy (3D-CRT) as well as intensity modulated radiotherapy treatment (IMRT) demand accurate dose calculation in order to increase target...
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Estimation of Inhomogeneity Correction Factor in Small Field Dosimetry

Shin HJ, Kang YN, Jang J, Seo JH, Jung JY, Choi BO, Choi IB, Lee DJ, Kwon SI

  • KMID: 1989082
  • Korean J Med Phys.
  • 2009 Dec;20(4):260-268.
In this study, we estimated inhomogeneity correction factor in small field. And, we evaluated accuracy of treatment planning and measurement data which applied inhomogeneity correction factor or not. We developed...
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Quality Control of Radiation Dosimetry Service

Lee JH, Lee SB, Chang KJ, Lee KY, Lee HK, Kim HJ, Jin GH

  • KMID: 1989081
  • Korean J Med Phys.
  • 2009 Dec;20(4):253-259.
We have developed standards based on international criterions for the quality control of dose tested by the measurement institutions of individual exposure doses through improving the reliability of data on...
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A Study on Compensation for Imaging Qualities Having Artifact with the Change of the Center Frequency Adjustment and Transmission Gain Values at 1.5 Tesla MRI

Lee JS, Goo EH, Park CS, Lee SY, Lee HJ

  • KMID: 1989080
  • Korean J Med Phys.
  • 2009 Dec;20(4):244-252.
The purpose of this study is to compensate for susceptibility and a ferromagnetic body artifact using CFA and TGV on MR Imaging. A total of 30 patients (15 men and...
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A Study on Usefulness of Specific Agents with Liver Disease at MRI Imaging: Comparison with Ferucarbotran and Gd-EOB-DTPA Contrast Agents

Lee JS, Goo EH, Park CS, Lee SY, Choi YS

  • KMID: 1989079
  • Korean J Med Phys.
  • 2009 Dec;20(4):235-243.
The purpose of this experiment is to know the relation of the detection and characterization of liver's diseases as comparison of finding at MR imaging using a Ferucarbotran (SPIO) and...
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Precision Validation of Electromagnetic Physics in Geant4 Simulation for Proton Therapy

Park SH, Rah JE, Shin JW, Park S, Yoon SC, Jung WG, Suh TS

  • KMID: 1989078
  • Korean J Med Phys.
  • 2009 Dec;20(4):225-234.
Geant4 (GEometry ANd Tracking) provides various packages specialized in modeling electromagnetic interactions. The validation of Geant4 physics models is a significant issue for the applications of Geant4 based simulation in...
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The Evaluation of Scattering Effects for Various Source Locations within a Phantom in Gamma Camera

Yu AR, Lee YS, Kim JS, Kim KM, Cheon GJ, Kim HJ

  • KMID: 1989077
  • Korean J Med Phys.
  • 2009 Dec;20(4):216-224.
(131)I is a radiological isotope being used widely for treatment of cancer as emitting gamma-ray and it is also applied to estimate the function of thyroid for its accumulation in...
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Evaluation on Protrusion of the Imaginary Prostate Volume Using Three-Dimensional Volume Rendering

Seoung YH, Joo YH, Rhim JD, Choe BY

  • KMID: 1989076
  • Korean J Med Phys.
  • 2009 Dec;20(4):208-215.
This study is to compare the accuracy of evaluation regarding the volume of the prostate, which three-dimensional volume rendering was produced the shape of protrusion, by measuring two kinds of...
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Evaluation of Unexposed Images after Erasure of Image Plate from CR System

Lim BY, Park HS, Kim JH, Park KH, Kim HJ

  • KMID: 1989075
  • Korean J Med Phys.
  • 2009 Dec;20(4):199-207.
It is important to initialize Image Plate (IP) completely for removing residual latent image by sodium lamp for reliability and repeatability of computed radiography (CR) system. The purpose of this...
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Dosimetric Characteristics of Edge Detector(TM) in Small Beam Dosimetry

Chang KH, Lee BR, Kim YH, Choi KS, Lee JS, Park BM, Bae YK, Hong S, Lee JW

  • KMID: 1989074
  • Korean J Med Phys.
  • 2009 Dec;20(4):191-198.
In this study, we evaluated an edge detector for small-beam dosimetry. We measured the dose linearity, dose rate dependence, output factor, beam profiles, and percentage depth dose using an edge...
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