Average Glandular Dose in Synchrotron Radiation Mammography

DOI 15 References
  • Fujisaki Tatsuya
    Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
  • Nishimura Katsuyuki
    Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
  • Saitoh Hidetoshi
    Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
  • Abe Shinji
    Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
  • Sekine Norio
    Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
  • Takahashi Yoshikazu
    Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
  • Inada Tetsuo
    Department of Radiological Sciences, Tokyo Metropolitan College of Health Sciences
  • Urahashi Shingo
    Department of Medical & Welfare's Engineering, College of Science & Technology, Nihon University

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  • 放射光を用いた乳房撮影における乳腺平均吸収線量

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Abstract

Synchrotron radiation (SR) has the properties of both high intensity and monochromaticity which cannot be obtained with conventional X-ray generated by an X-ray tube. Although studies on mammography as an application of SR to medical diagnosis have been performed, there has been little work about the dependences of glandular dose on X-ray energy, breast compositions and breast thickness.<BR>It is difficult to measure the average glandular dose directly, so we calculated conversion factors to obtain average dose from incident air kerma using Monte Carlo simulation.<BR>In this study, the following results were obtained.: (1) A difference of 1 keV has a significant effect on the average glandular dose. (2) The average glandular dose in young age is about 50 % higher than in old age when the same absorbed dose is applied in phosphor layer. (3) The average glandular dose required in mammography is less dependent on the X-ray energy than the air kerma.

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