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Digital Tomosynthesis Imaging of the Chest : Comparison of Patient Exposure Dose and Image Quality between Default Setting and Use Additional Filter

흉부 디지털토모영상의 기본모드 및 부가여과사용 시 환자선량과 화질비교

  • 김계선 (가천대학교 보건대학원 방사선학과/삼성서울병원 영상의학과) ;
  • 안성민 (가천대학교 보건대학원 방사선학과/가천대학교 방사선학과) ;
  • 김성철 (가천대학교 보건대학원 방사선학과/가천대학교 방사선학과)
  • Received : 2013.08.14
  • Accepted : 2013.09.09
  • Published : 2013.09.28

Abstract

Chest digital tomosynthesis was the most advanced digital radiography technology, but it was higher patient dose than conventional chest radiography. Thus we tried to reduce a patient dose of chest digital tomosynthesis and evaluated its image quality. Result shows that radiation dose such as ESD, DAP and ED were 1.95 mGy, 17.66 $dGycm^2$ and 0.133 mSv respectively in default setting and 0.312 mGy, 2.27 $dGy.cm^2$ and 0.052 mSv in use additional filter, respectively. Doses were decrease 66.2%, 73.6% and 57.4% in ESD, DAP and ED, respectively. At the image quality assessment, overall sensitivities of use additional filter for nodule detection were not inferior to default mode for peripheral, central and peripheral micro nodules. However, sensitivity of low dose mode was significantly inferior to the default for central micro-nodules(p < .001).

Keywords

Additional Filter;Chest Radiography;Digital Tomosynthesis;Patient Dose

Acknowledgement

Supported by : 가천대학교

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