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A novel mammographic fusion imaging technique: the first results of tumor tissues detection from resected breast tissues using energy-resolved photon counting detector
Author(s): Mariko Sasaki; Shuji Koyama; Yoshie Kodera; Reina Suzuki; Hiroto Kimura; Hiroto Nishide; Mitsuhiro Mizutani; Megumi Watanabe; Naoko Yoshida; Hiroaki Hayashi; Natsumi Kimoto; Shuichiro Yamamoto; Daisuke Hashimoto; Masahiro Okada
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Paper Abstract

We developed a prototype photon-counting mammography unit with a cadmium zinc telluride detector, which provides a new type of image with physical analysis parameters. Using the X-ray attenuation information obtained from this device, we examined the ability of this technique in discriminating substances and estimating their compositions. To estimate the substance compositions, we used resected breast tissues immediately after a surgical operation for invasive carcinoma of no special type, and used phantoms to reproduce mammary glands and adipose tissue. In our system, the spectrum penetrating the substance was measured with three energy bins in each pixel. The products of linear-attenuation coefficient and thicknesses for each bin were calculated. Using these three values, the scatterplots displaying all the values calculated from each pixel inside the region of interest (ROI) on the image were created. The scatterplot displaying only gravity values calculated for each ROI on the image was created for evaluating the separation of plot points to discriminate between different substance compositions. The gravity points placed on the malignant tumor tissue were plotted separately from those on the normal tissue. Furthermore, a fusion image was created by overlapping an X-ray image and values of this scatterplot points represented on a 10-step color scale. The fusion image was highlighting the differences in substance compositions using color tone, such as malignant tumor or mammary gland tissue, by adjusting the color scale level.

Paper Details

Date Published: 1 March 2019
PDF: 9 pages
Proc. SPIE 10948, Medical Imaging 2019: Physics of Medical Imaging, 1094864 (1 March 2019); doi: 10.1117/12.2512271
Show Author Affiliations
Mariko Sasaki, Nagoya Univ. Graduate School of Medicine (Japan)
Shuji Koyama, Nagoya Univ. Graduate School of Medicine (Japan)
Yoshie Kodera, Nagoya Univ. Graduate School of Medicine (Japan)
Reina Suzuki, Nagoya Univ. Graduate School of Medicine (Japan)
Hiroto Kimura, Nagoya Univ. Graduate School of Medicine (Japan)
Hiroto Nishide, Gifu Univ. of Medical Science (Japan)
Mitsuhiro Mizutani, Mikawa Breast Cancer Clinic (Japan)
Megumi Watanabe, Mikawa Breast Cancer Clinic (Japan)
Naoko Yoshida, Mikawa Breast Cancer Clinic (Japan)
Hiroaki Hayashi, Kanazawa Univ. (Japan)
Natsumi Kimoto, Kanazawa Univ. (Japan)
Shuichiro Yamamoto, JOB Corp. (Japan)
Daisuke Hashimoto, JOB Corp. (Japan)
Masahiro Okada, JOB Corp. (Japan)


Published in SPIE Proceedings Vol. 10948:
Medical Imaging 2019: Physics of Medical Imaging
Taly Gilat Schmidt; Guang-Hong Chen; Hilde Bosmans, Editor(s)

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