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The evaluation of the radiation dose and the image quality during MDCT using Glass Rod Detector

유리선량계를 이용한 복부 MDCT 검사시 피폭선량 및 화질평가

  • 김창규 (김천대학교 방사선학과) ;
  • 박병섭 (김천대학교 방사선학과)
  • Received : 2012.03.02
  • Accepted : 2012.03.23
  • Published : 2012.03.31

Abstract

Assessing the exposure dose and the obtained image during the abdominal radiography with 128-slice MDCT scanner and 4-slice MDCT scanner which are recently being used in clinics using the body tissue-equivalent phantom and the glass dosimeter, the results were as follows. During the CT test for the abdomen, the absorbed dose was $35.8{\pm}0.46mGy$ in 4-MDCT, and $19.03{\pm}0.25mGy$ in 128-MDCT, which indicated that the radiation dose necessary to obtain the image meaningful to diagnosis was required less by 128-MDCT(P<0.05). As a result of analyzing the image obtained from the abdominal test using MDCT with a 5-point Likert scale, 4-MDCT showed the result of 3.52 points, and 128-MDCT showed the result of 4.01 points, that is, the image quality of 128-MDCT was evaluated high, and there was a statistically significant difference. In the results above, it is considered that 128 slice MDCT scanner will be much used later as it can reduce the radiation exposure, and make us obtain the high quality of image.

Keywords

MDCT;Radiation dose;image quality;Glass rod detector