Using energy-resolved X-ray computed tomography with a current mode detector to distinguish materials

被引：15

作者：

Kanno, Ikuo ^{[1
]}

Imamura, Ryo ^{[1
]}

Yamashita, Yoshiki ^{[1
]}

Ohtaka, Masahiko ^{[2
]}

Hashimoto, Makoto ^{[2
]}

Ara, Kuniaki ^{[2
]}

Onabe, Hideaki ^{[3
]}

机构：

[1] Kyoto Univ, Dept Nucl Engn, Kyoto 6158530, Japan

[2] Japan Atom Energy Agcy, Oarai, Ibaraki 3111393, Japan

[3] Raytech Corp, Utsunomiya, Tochigi 3210904, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2014年 / 53卷 / 05期

基金：

日本学术振兴会;

关键词：

TRANSXEND DETECTOR; CONTRAST-MEDIA;

D O I：

10.7567/JJAP.53.056601

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In conventional X-ray computed tomography (CT), X-rays are measured as electric current. Materials inside a subject are described by the linear attenuation coefficients averaged by the energy spectrum of the X-rays. A CT image cannot distinguish materials such as iodine and calcium, because the linear attenuation coefficient is not inherent to a material, but the product of X-ray mass attenuation coefficient and the density of the material. Materials such as iodine and calcium can be distinguished using an energy-resolved CT technique, with a current-mode detector system, using segment detectors aligned in the direction of X-ray incidence: the energy-resolved CT images are reconstructed by the X-rays with the energy of interest, by unfolding electric currents measured by the segment detectors. (C) 2014 The Japan Society of Applied Physics

引用

页数：4

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