Glandularity Estimation in Japanese Women by Using a Breast Model Made from Mammographic Findings of European Women

DOI Web Site Web Site 参考文献17件
  • KAWAGUCHI Ai
    Department of Radiological Technology, Graduate School of Medicine, Tohoku University Department of Radiology, TOYOTA Memorial Hospital
  • MATSUNAGA Yuta
    Department of Radiological Technology, Graduate School of Medicine, Tohoku University Department of Imaging, Nagoya Kyoritsu Hospital
  • ASADA Yasuki
    School of Health Sciences, Fujita Health University
  • SUZUKI Shoichi
    School of Health Sciences, Fujita Health University
  • CHIDA Koichi
    Department of Radiological Technology, Graduate School of Medicine, Tohoku University

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説明

This study aimed to estimate breast glandularity in Japanese women using patient exposure conditions and tissue-equivalent materials by a conventional method. Typical glandularities in Japanese women were compared with those in European women to verify the validity of the average glandular dose estimation manual based on the EUREF protocol. Glandularity was estimated from the data of 600 patients and the model breast of the tissue-equivalent materials which had various amounts of glandular contents and thicknesses. The model breasts were measured to examine the relationships between the thickness of the glandular contents and tube loading by using an automatic exposure control system. Then, equations were established to determine glandularity from patient data. The mean glandularity in the highest compressed breast thickness (CBT) group of 36-45 mm was 72%. The mean CBT of the 184 (31%) patients with glandularities exceeding 100% was 31 mm. Glandularities in patients with CBT of 30-70 mm in the present study were higher compared to those in European women by approximately 10-20%. The results suggest that the model breast of European women might not be a suitable reference standard for more than 30% of Japanese women, who have breasts with lower CBT.

収録刊行物

  • 保健物理

    保健物理 51 (4), 238-244, 2016

    日本保健物理学会

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