Development of Digital Phantom for Digital Mammography with Soft-Copy Reading

  • Norimitsu Shinohara
  • Katsuhei Horita
  • Tokiko Endo
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9699)


In Japan, soft-copy diagnoses shift rapidly, and the method for facilities applying it is necessary for soft-copy diagnosis. Digital mammography has high resolution and a large matrix size. On a monitor, the image is either displayed partially at 1:1 pixel mapping or narrowed to fit the screen, resulting in loss of image quality. Therefore, we developed a digital phantom for soft-copy diagnosis in digital mammography. This phantom is like the Contrast Detail Phantom and comprises 12 different shapes and eight different brightness levels. It becomes one group of nine, and each signal is located at the prime number coordinate from a central signal coordinate. Visual evaluation refers to the visibility of the nine signal coordinates when the image is adjusted to fit the monitor’s display. Although digital phantoms have been implemented at 120 facilities, at two other facilities, viewer problems were detected.


Digital phantom Soft-copy diagnosis Mammography Visual evaluation 


  1. 1.
    Office for Cancer Control, Health Services Bureau, Ministry of Health, Labour and Welfare, JAPAN: Basic Plan to Promote Cancer Control Programs. Accessed 20 June 2015. (In Japanese)
  2. 2.
    Minami, Y., Tsubono, Y., Nishino, Y., Ohuchi, N., Shibuya, D., Hisamichi, S.: The increase of female breast cancer incidence in Japan: emergence of birth cohort effect. Int. J. Cancer 108(6), 901–906 (2004). (In Japanese)CrossRefGoogle Scholar
  3. 3.
    List of facilities with mammography in Japan. Mon. New Med. 36(10), 177–183 (2009). (In Japanese)Google Scholar
  4. 4.
    The modality installation number deciphered from data. Rad Fun. 10(6), 67–69 (2012). (In Japanese)Google Scholar
  5. 5.
    Bick, U., Diekmann, F.: Digital Mammography. Medical Radiology-Diagnostic Imaging. Springer, Heidelberg (2010)CrossRefGoogle Scholar
  6. 6.
    Quality assurance programme for digital mammography. IAEA Human Health Series, vol. 17, pp. 79–115. IAEA, Austria (2011)Google Scholar
  7. 7.
    Ihori, A., Fujita, N., Yasuda, N., Sugiura, A., Kodera, Y.: Phantom-based comparison of conventional versus phase-contrast mammography for LCD soft-copy diagnosis. Int. J. Comput. Assist. Radiol. Surg. 8(4), 621–633 (2013)CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Department of Radiological Technology, Faculty of Health SciencesGifu University of Medical ScienceSekiJapan
  2. 2.The Japan Central Organization on Quality Assurance of Breast Cancer ScreeningHamadaJapan
  3. 3.Department of RadiologyNational Hospital Organization Higashi Nagoya National HospitalNagoyaJapan

Personalised recommendations