A Study on the Detection Ability of Minute Lesions in X-ray Using the Molybdenum Target

Molybdenum 저지극을 이용한 X-ray의 미세병소 검출능력에 관한 연구

  • Yang, Da-Rae (Department of Radiological Technology, Gwangju Health College University) ;
  • Dong, Kyung-Rae (Department of Radiological Technology, Gwangju Health College University) ;
  • Park, Yong-Soon (Department of Radiological Technology, Gwangju Health College University) ;
  • Ji, Youn-Sang (Department of Radiological Technology, Gwangju Health College University) ;
  • Kim, Young-Keun (Department of Radiological Technology, Gwangju Health College University) ;
  • Kim, Chang-Bok (Department of Radiological Technology, Gwangju Health College University)
  • 양다래 (광주보건대학 방사선과) ;
  • 동경래 (광주보건대학 방사선과) ;
  • 박용순 (광주보건대학 방사선과) ;
  • 지연상 (광주보건대학 방사선과) ;
  • 김영근 (광주보건대학 방사선과) ;
  • 김창복 (광주보건대학 방사선과)
  • Received : 2010.02.22
  • Accepted : 2010.03.19
  • Published : 2010.03.30

Abstract

Beam quality is determined according to Xray tube's target material. In a range of between 22 kVp and 28 kVp, molybdenum target generates the characteristics energy between the average 17.9 kVp and 19.5 kVp, which produces the high contrast image of the breast. In this study, we used the Mo/Mo combination breast device and ALVIM TRM phantom and measured the detection ability of the minute lesion in the breast imaging throughout analyzing ROC curves. Assuming that an average subject thickness of the breast is 40 mm, the detection ability was not dependent on the kVp changes in a while dependent on both the mAs and thickness change. We can assure that it is not needed to increase the kVp for the imaging of breast which thickness is within the mean range of 40 mm.

References

  1. Gold RH, Bassett LW. X-ray mammography : history, contriversy, and state of the art. In: Bassett LW, Gold RH. Mammography, thermography, and ultrasound in breast cancer detection. New york; Grune & Stratton, 1982:3-11.
  2. Haus AG. Physical principles and radiation dose in mammography. Med. Radiogr. Photogr. 1982; 58(3):70-80.
  3. Haus AG, Doi K, Metz CE. Image quality in mammography. Radiology 1977 October;125: 77-85.
  4. Jans RG, Butler PF, McCrohan JJ. Status of film/screen mammography : Results of the BENT study. Radiology 1979;132:197-200. https://doi.org/10.1148/132.1.197
  5. Bley TA, Kotter E, Saueressig U, Springer OS, Fisch D, Ghanem NA, Lager M. Using Receiver Operating Characteristic Metholdology to Evaluate the Diagnostic Quality on Paper Prints Versus Film. American Roentgen Ray Society 2003;181:1487-1490. https://doi.org/10.2214/ajr.181.6.1811487
  6. Shoji S, Chabatake M, Yamamoto T, Mizushima T, Shimada Y, Sanada S, Koshida K. A Study of ALVIM Mammographic Statistical Phantom TRM: 1st Report: Introduction of this Phantom. 日本放 射線技術學會第54回綜合學術大會發表錄 1998:334.
  7. Chabatake M, Shoji S, Yamamoto T, Mizushima T , Shimada Y, Sanada S, Koshida K. A Study of ALVIM Mammographic Statistical Phantom TRM: 2nd Report: Comparison of ROC Analysis and RMI 156 Phantom. 日本放射線技術學會第54回綜合 學術大會發表錄 1998:335.
  8. 허준. 증감지 격자에 따른 화상의 ROC 곡선의 평가. 대한방사선기술학회지. 1994;17(2):45-49.
  9. 허준, 이인자, 김건중, 유명선, 김정민. ROC 곡선에 의한 화질의 평가. 대한방사선기술학회지 1991;14(2):33-36.
  10. Charles EM. ROC 解析の基礎. 日本放射線技術學會志 1990;46(6):831-839.