Reconstruction of mammography x-ray spectrum by using Rayleigh and Compton scattering corrections

Souichiro Kawaguchi, Yoshiki Yamaguchi, Hidetaka Arimura, Junji Morishita, Masafumi Ohki, Yoshinori Uno, Tadamitsu Ideguchi, Yoshiharu Higashida, Fukai Toyofuku

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 被引用数 (Scopus)

抄録

The analysis of the x-ray spectrum is important for quality assurance (QA) and quality control (QC) of a radiographic system such as mammography. In the case of mammography, the direct measurement of the primary x-ray spectra under clinical conditions is very difficult and time-consuming mainly because it is almost impossible to increase the longitudinal distance between the focal spot and x-ray detector in order to make the photon counting measurement possible. An alternative way of measuring the primary spectra is to correct the 90 degree scattered x-ray spectra which can be measured without photon pile-up since the intensity of the scattered x-rays is significantly lowered. The scattered x-ray spectrum is composed of two components, Compton scattered photons and Rayleigh scattered photons. We have developed a new method of reconstructing the primary x-ray spectrum from the scattered x-ray spectrum taking into account both Rayleigh and Compton scattered photons . The 90 degree scattered x-ray spectrum from a 28 kV mammography x-ray unit was measured at a tube voltage by using a CdTe semiconductor detector. The reconstructed spectrum agreed fairly well with a directly measured primary x-ray spectrum. The Rayleigh and Compton scattering correction method could be suitable for measuring the mammography x-ray spectra under clinical conditions and useful for QA and QC of the mammography x-ray units.

本文言語英語
ホスト出版物のタイトルWorld Congress on Medical Physics and Biomedical Engineering
ホスト出版物のサブタイトルDiagnostic Imaging
ページ231-233
ページ数3
2
DOI
出版ステータス出版済み - 2009
イベントWorld Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging - Munich, ドイツ
継続期間: 9 7 20099 12 2009

出版物シリーズ

名前IFMBE Proceedings
番号2
25
ISSN(印刷版)1680-0737

その他

その他World Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging
Countryドイツ
CityMunich
Period9/7/099/12/09

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomedical Engineering

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