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Calibration Examination of Dose Area Product Meters using X-ray

X선을 이용한 면적선량계의 교정 연구

  • Jung, Jae Eun (Department of Radiological Science, Daegu Health College) ;
  • Won, Do-Yeon (Department of Radiological Science, Daegu Health College) ;
  • Jung, Hong-Moon (Department of Radiological Science, Daegu Health College) ;
  • Kweon, Dae Cheol (Department of Radiological Science, College of Health Science, Shinhan University)
  • 정재은 (대구보건대학교 방사선과) ;
  • 정홍문 (대구보건대학교 방사선과) ;
  • 원도연 (대구보건대학교 방사선과) ;
  • 권대철 (신한대학교 보건과학대학 방사선학과)
  • Received : 2017.02.10
  • Accepted : 2017.02.28
  • Published : 2017.02.28

Abstract

We measured the absorbed dose and the area dose using an ionization chamber type of area dose product (DAP) meter and measured the calibration factor in the X-ray examination. In the indirect dose measurement method, the detector was installed in the radiation part of the X-ray equipment, and the measured value was calculated as the dose at the exposure part. The instrument used to calculate the calibration factor was an X-ray equipment (DK-550R / F, DongKang Medical Co., Ltd., Seoul, Korea). The calibration method for the calibration factor was to connect the DAP meter (PD-8100, Toreck Co. Ltd., Japan) to the calibration dosimeter tube voltage of 70 kV, tube current of 500 mA, 0.158 sec. The reference dosimeter used a semiconductor (DOSIMAX plus A, Scanditronix, $Wellh{\ddot{o}}fer$, Germany). After installing the DAP meter on the front of the multi-collimator of the ionization chamber, the calibration factor of the dosimeter was obtained using the reference dosimeter for accurate dose measurement. Experimental exposure values and values from the calibration dosimeter were calculated by multiplying each calibration factor. The calibration factor was calculated as 1.045. In order to calculate the calibration coefficient according to the tube voltage in the ionization type DAP dosimeter, the absorbed dose and the area dose were calculated and the calibration factor was calculated. The corrective area dose was calculated by calculating the calibration factor of the DAP meter.

Keywords

Absorbed dose;Calibration factor;Dose area product;X-ray

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