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The Effects of Nanoparticles for Irradiation

Yea JW, Shin HJ

  • KMID: 2320055
  • Yeungnam Univ J Med.
  • 2011 Dec;28(2):145-152.
BACKGROUND: To evaluate the changes in the radiation dose and temperature distribution on irradiated egg albumin and nanoparticle (Fe3O4) powder mixed egg albumin. METHODS: A new type of phantom was designed...
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Clinical performance of FractionLab in patient-specific quality assurance for intensity-modulated radiotherapy: a retrospective study

Oh SA, Kim SY, Park J, Park JW, Yea JW

Background: This study was aimed at comparing and analyzing the results of FractionLab (Varian/Mobius Medical System) with those of portal dosimetry that uses an electronic portal imaging device. Portal dosimetry...
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Non-coplanar whole brain radiotherapy is an effective modality for parotid sparing

Park J, Park JW, Yea JW

BACKGROUND: The purpose of this study was to evaluate the efficacy and feasibility of non-coplanar whole brain radiotherapy (NC-WBRT) for parotid sparing. METHODS: Fifteen cases, previously treated with WBRT were selected....
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Feasibility of Fabricating Variable Density Phantoms Using 3D Printing for Quality Assurance (QA) in Radiotherapy

Oh SA, Kim MJ, Kang JS, Hwang HS, Kim YJ, Kim SH, Park JW, Yea JW, Kim SK

The variable density phantom fabricated with varying the infill values of 3D printer to provide more accurate dose verification of radiation treatments. A total of 20 samples of rectangular shape...
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A Comparison between Portal Dosimetry and Mobius3D Results for Patient-Specific Quality Assurance in Radiotherapy

Kim SY, Park J, Park JW, Yea JW, Oh SA

Purpose: The purpose of this study was to compare the clinical quality assurance results of portal dosimetry using an electronic portal imaging device, a method that is extensively used for...
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The Dose Attenuation according to the Gantry Angle and the Photon Energy Using the Standard Exact Couch and the 6D Robotic Couch

Kim TH, Oh SA, Yea JW, Park JW, Kim SK

The objective of this study is to increase the accuracy of dose transmission in radiation therapy using two types of treatment tables, standard exact couch (Varian 21EX, Varian Medical Systems,...
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Fabrication of a Patient-Customized Helmet with a Three-Dimensional Printer for Radiation Therapy of Scalp

Oh SA, Lee CM, Lee MW, Lee YS, Lee GH, Kim SH, Kim SK, Park JW, Yea JW

The purpose of the present study was to develop and evaluate patient-customized helmets with a three-dimensional (3D) printer for radiation therapy of malignant scalp tumors. Computed tomography was performed in...
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Feasibility and Efficacy of Adaptive Intensity Modulated Radiotherapy Planning according to Tumor Volume Change in Early Stage Non-small Cell Lung Cancer with Stereotactic Body Radiotherapy

Park JW, Kang MK, Yea JW

The purpose of this study is to evaluate efficacy and feasibility of adaptive radiotherapy according to tumor volume change (TVC) in early stage non-small cell lung cancer (NSCLC) using stereotactic...
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Postoperative Complications after Preoperative Chemoradiotherapy Combined with Hyperthermia in Locally Advanced Rectal Cancer

Yea JW

We investigated whether regional hyperthermia (HT) increased post-surgical complications in patients with locally advanced rectal cancer treated with preoperative concurrent chemoradiotherapy (CCRT). Between 1996 and 2007, 205 patients treated with...
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A Correction Method of Dose to Attenuation Rate of Transmitting Photon Beam Through Couch Top for Radiosurgery Using Novalis

Kim SJ, Shin HS, Ko SY, Park H, Kim JY, Lee BM, Yea JW, Kim SK

  • KMID: 2307125
  • Korean J Med Phys.
  • 2011 Mar;22(1):12-17.
This study has its own goal to deliver the accurate dose on the target volume by calculating and modifying the attenuation rate of photon beam transmitting the couch top with...
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Comparison of the Dose Distributions with Beam Arrangements in the Stereotactic Body Radiotherapy (SBRT) for Primary Lung Cancer

Yea JW

To compare 2 beam arrangements, circumferential equally angles (EA) beams or partially angles (PA) beams for stereotactic body radiation therapy (SBRT) of primary lung cancer for intensity-modulated radiation therapy (IMRT)...
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Comparison of Temperature Distribution in Agar Phantom and Gel Bolus Phantom by Radiofrequency Hyperthermia

Jung DK, Kim SK, Lee JH, Youn SM, Kim HD, Oh SA, Park JW, Yea JW

The usefulness of Gel Bolus phantom was investigated by comparing the temperature distribution characteristic of the agar phantom produced to investigate the dose distribution characteristic of radiofrequency hyperthermia device with...
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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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Whole brain radiotherapy using four-field box technique with tilting baseplate for parotid gland sparing

Park J, Yea JW

PURPOSE: The aim of this study is to evaluate the efficacy and feasibility of four-field box whole brain radiotherapy (FB-WBRT) with tilting baseplate by comparing bilateral WBRT (B-WBRT). METHODS AND MATERIALS:...
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The impact of beam angle configuration of intensity-modulated radiotherapy in the hepatocellular carcinoma

Kim SH, Kang MK, Yea JW, Kim SK, Choi JH, Oh SA

  • KMID: 2316712
  • Radiat Oncol J.
  • 2012 Sep;30(3):146-151.
PURPOSE: This treatment planning study was undertaken to evaluate the impact of beam angle configuration of intensity-modulated radiotherapy (IMRT) on the dose of the normal liver in hepatocellular carcinoma (HCC). MATERIALS...
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The Output Factor of Small Field in Multileaf Collimator of 6 MV Photon Beams

Lee HJ, Choi TJ, Oh YK, Jeun KS, Lee YH, Kim JH, Kim OB, Oh SA, Kim SK, Yea JW

The IMRT is proper implement to get high dose deliver to tumor as its shape and selective approach in radiation therapy. Since the IMRT is performed as modulated the radiation...
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Basic Data Analysis of the Quality Control for Patient Safety in Department of Radiation Oncology at Yeungnam University Hospital

Oh SA, Kim SK, Yea JW, Kang MK, Lee JH, Lee R

In order to establish the quality control on patient safety following the guideline presented by American Association of Physicists in Medicine (AAPM) TG-100 committee, we aim to analyze the modes...
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Analysis of Output Constancy Checks Using Process Control Techniques in Linear Accelerators

Oh SA, Yea JW, Kim SW, Lee R, Kim SK

The purpose of this study is to evaluate the results for the quality assurance through a statistical analysis on the output characteristics of linear accelerators belonging to Yeungnam University Medical...
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Comparison of Intensity Modulated Radiation Therapy Dose Calculations with a PBC and AAA Algorithms in the Lung Cancer

Oh SA, Kang MK, Yea JW, Kim SH, Kim KH, Kim SK

  • KMID: 1436553
  • Korean J Med Phys.
  • 2012 Mar;23(1):48-53.
The pencil beam convolution (PBC) algorithms in radiation treatment planning system have been widely used to calculate the radiation dose. A new photon dose calculation algorithm, referred to as the...
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Hypothyroidism after Radiotherapy of Locally Advanced Head and Neck Cancer

Lee JE, Kim JC, Yea JW, Park IK

PURPOSE: The aim of the present study was to retrospectively evaluate the incidence of hypothyroidism in locally advanced head and neck cancer patients who received radiotherapy (RT) either with or...
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