Fan-beam monochromatic x-ray CT using fluorescent x-rays excited by synchrotron radiation

被引：1

作者：

Toyofuku, F ^{[1
]}

Tokumori, K ^{[1
]}

Kanda, S ^{[1
]}

Higashida, Y ^{[1
]}

Ohki, M ^{[1
]}

Cho, T ^{[1
]}

Nishimura, K ^{[1
]}

Hyodo, K ^{[1
]}

Ando, M ^{[1
]}

Uyama, C ^{[1
]}

机构：

[1] Kyushu Univ, Sch Hlth Sci, Dept Radiol Technol, Higashi Ku, Fukuoka 81282, Japan

来源：

MEDICAL APPLICATIONS OF PENETRATING RADIATION | 1999年 / 3770卷

关键词：

synchrotron radiation; fluorescent x-ray; monochromatic x-ray CT; fan-beam; CdTe array detector;

D O I：

10.1117/12.368188

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Monochromatic x-ray CT has several advantages over conventional CT, which utilizes bremsstrahlung white x-rays from an x-ray tube. Although various types of monochromatic x-ray CT systems using synchrotron radiation have been developed using a parallel x-ray beam for imaging of small samples with a high spatial resolution, imaging of large objects such as the human body have not been developed yet. We have developed a fan-beam monochromatic x-ray CT using fluorescent x-rays generated by irradiating metal targets by synchrotron radiation. A CdTe linear array detector of 512mm sensitive width was used in the photon counting mode. We made phantom experiments using fluorescent x-rays ranging from 32 to 75 k eV. Monochromatic x-ray CT images of a cylindrical lucite phantom filled with several contrast media have been obtained. Measured CT numbers are compared with linear attenuation coefficients, and they showed a good linearity over a wide range of contrast media concentrations.

引用

页码：48 / 56

页数：9

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