Demonstration of iodine K-edge imaging by use of an energy-discrimination X-ray computed tomography system with a cadmium telluride detector

被引：40

作者：

Abudurexiti A. ^{[1
]}

Kameda M. ^{[1
]}

Sato E. ^{[2
]}

Abderyim P. ^{[2
]}

Enomoto T. ^{[3
]}

Watanabe M. ^{[3
]}

Hitomi K. ^{[4
]}

Tanaka E. ^{[5
]}

Mori H. ^{[6
]}

Kawai T. ^{[7
]}

Takahashi K. ^{[8
]}

Sato S. ^{[8
]}

Ogawa A. ^{[9
]}

Onagawa J. ^{[10
]}

机构：

[1] Faculty of Software and Information Science, Iwate Prefectural University, Takizawa 020-0193

[2] Department of Physics, Iwate Medical University, Yahaba 028-3694

[3] 3rd Department of Surgery, Toho University School of Medicine, Tokyo 153-8515, Meguro-ku

[4] Department of Electronics and Intelligent Systems, Tohoku Institute of Technology, Sendai 982-8577, Taihaku-ku

[5] Department of Nutritional Science, Faculty of Applied Bio-science, Tokyo University of Agriculture, Tokyo 156-8502, Setagaya-ku

[6] Department of Physiology, Tokai University School of Medicine, Isehara, Kanagawa 259-1193

[7] Organization for Hamamatsu Technopolis, Headquarters of Hamamatsu Knowledge Cluster, Hamamatsu, Shizuoka 432-8036, Naka-ku

[8] Department of Microbiology, School of Medicine, Iwate Medical University, Morioka 020-0023

[9] Department of Neurosurgery, School of Medicine, Iwate Medical University, Morioka 020-0023

[10] Department of Electronics, Faculty of Engineering, Tohoku Gakuin University, Miyagi 985-8537, Tagajo

来源：

Radiological Physics and Technology | 2010年 / 3卷 / 2期

基金：

日本科学技术振兴机构;

关键词：

CdTe detector; Energy discrimination; Iodine K-edge CT; Photon counting; X-ray CT;

D O I：

10.1007/s12194-010-0088-8

中图分类号：

学科分类号：

摘要：

An energy-discrimination K-edge X-ray computed tomography (CT) system is useful for increasing the contrast resolution of a target region by utilizing contrast media. The CT system has a cadmium telluride (CdTe) detector, and a projection curve is obtained by linear scanning with use of the CdTe detector in conjunction with an X-stage. An object is rotated by a rotation step angle with use of a turntable between the linear scans. Thus, CT is carried out by repetition of the linear scanning and the rotation of an object. Penetrating X-ray photons from the object are detected by the CdTe detector, and event signals of X-ray photons are produced with use of charge-sensitive and shaping amplifiers. Both the photon energy and the energy width are selected by use of a multi-channel analyzer, and the number of photons is counted by a counter card. For performing energy discrimination, a low-dose-rate X-ray generator for photon counting was developed; the maximum tube voltage and the minimum tube current were 110 kV and 1.0 μA, respectively. In energy-discrimination CT, the tube voltage and the current were 60 kV and 20.0 μA, respectively, and the X-ray intensity was 0.735 μGy/s at 1.0 m from the source and with a tube voltage of 60 kV. Demonstration of enhanced iodine K-edge X-ray CT was carried out by selection of photons with energies just beyond the iodine K-edge energy of 33.2 keV. © 2010 Japanese Society of Radiological Technology and Japan Society of Medical Physics.

引用

页码：127 / 135

页数：8

共 19 条

[1] Sato E., Sagae M., Tanaka E., Hayasi Y., Germer R., Mori H., Kawai T., Ichimaru T., Sato S., Takayama K., Ido H., Quasi-monochromatic flash X-ray generator utilizing disk-cathode molybdenum tube, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 43, 10, pp. 7324-7328, (2004)
[2] Sato E., Tanaka E., Mori H., Kawai T., Inoue T., Ogawa A., Et al., Characteristic X-ray generator utilizing angle dependence of bremsstrahlung X-ray distribution, Jpn J Appl Phys, 45, pp. 2845-2849, (2006)
[3] Germer R., X-ray flash techniques, J Phys e Sci Instrum, 12, pp. 336-350, (1979)
[4] Shikoda A., Sato E., Sagae M., Oizumi T., Tamakawa Y., Yanagisawa T., Repetitive flash X-ray generator having a high-durability diode driven by a two-cable-type line pulser, Rev Sci Instrum, 65, pp. 850-856, (1994)
[5] Takahashi K., Sato E., Sagae M., Oizumi T., Tamakawa Y., Yanagisawa T., Fundamental study on a long-duration flash x-ray generator with a surface-discharge triode, Jpn J Appl Phys, 33, pp. 4146-4151, (1994)
[6] Sato E., Tanaka E., Mori H., Kawai T., Sato S., Takayama K., Clean monochromatic X-ray irradiation from weakly ionized linear copper plasma, Opt Eng, 44, pp. 0490021-0490026, (2005)
[7] Sato E., Hayashi Y., Germer R., Tanaka E., Mori H., Kawai T., Inoue T., Ogawa A., Sato S., Takayama K., Onagawa J., X-ray spectra from weakly ionized linear copper plasma, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 45, 6 A, pp. 5301-5306, (2006)
[8] Sato E., Obara H., Enomoto T., Tanaka E., Mori H., Kawai T., Et al., X-ray spectra from a brass-target plasma triode, Jpn J Med Phys, 27, pp. 163-171, (2008)
[9] Sato E., Hayasi Y., Kimura K., Tanaka E., Mori H., Kawai T., Inoue T., Ogawa A., Sato S., Takayama K., Onagawa J., Ido H., Enhanced K-edge angiography utilizing tantalum plasma X-ray generator in conjunction with gadolinium-based contrast media, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 44, 12, pp. 8716-8721, (2005)
[10] Sato E., Hayasi Y., Tanaka E., Mori H., Kawai T., Inoue T., Ogawa A., Sato S., Takayama K., Onagawa J., Ido H., K-edge angiography utilizing a tungsten plasma X-ray generator in conjunction with gadolinium-based contrast media, Radiation Physics and Chemistry, 75, 11 SPEC. ISS., pp. 1841-1849, (2006)

← 1 2 →