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Proceedings Paper

Estimation of mammary gland composition using CdTe series detector developed for photon-counting mammography
Author(s): Akiko Ihori; Chizuru Okamoto; Tsutomu Yamakawa; Shuichiro Yamamoto; Masahiro Okada; Ai Nakajima; Misa Kato; Yoshie Kodera
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Paper Abstract

Energy resolved photon-counting mammography is a new technology, which counts the number of photons that passes through an object, and presents it as a pixel value in an image of the object. Silicon semiconductor detectors are currently used in commercial mammography. However, the disadvantage of silicon is the low absorption efficiency for high X-ray energies. A cadmium telluride (CdTe) series detector has a high absorption efficiency over a wide energy range. In this study, we proposed a method to estimate the composition of the mammary gland using a CdTe series detector as a photon-counting detector. The fact that the detection rate of breast cancer in mammography is affected by mammary gland composition is now widely accepted. Assessment of composition of the mammary gland has important implications. An important advantage of our proposed technique is its ability to discriminate photons using three energy bins. We designed the CdTe series detector system using the MATLAB simulation software. The phantom contains nine regions with the ratio of glandular tissue and adipose varying in increments of 10%. The attenuation coefficient for each bin’s energy was calculated from the number of input and output photons possessed by each. The evaluation results obtained by plotting the attenuation coefficient μ in a three-dimensional (3D) scatter plot show that the plots had a regular composition order congruent with that of the mammary gland. Consequently, we believe that our proposed method can be used to estimate the composition of the mammary gland.

Paper Details

Date Published: 29 March 2016
PDF: 6 pages
Proc. SPIE 9783, Medical Imaging 2016: Physics of Medical Imaging, 97832F (29 March 2016); doi: 10.1117/12.2216378
Show Author Affiliations
Akiko Ihori, Nagoya Univ. (Japan)
Chizuru Okamoto, Nagoya Univ. (Japan)
Tsutomu Yamakawa, JOB Corp. (Japan)
Shuichiro Yamamoto, JOB Corp. (Japan)
Masahiro Okada, JOB Corp. (Japan)
Ai Nakajima, Nagoya Univ. (Japan)
Misa Kato, Nagoya Univ. (Japan)
Yoshie Kodera, Nagoya Univ. (Japan)

Published in SPIE Proceedings Vol. 9783:
Medical Imaging 2016: Physics of Medical Imaging
Despina Kontos; Thomas G. Flohr, Editor(s)

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