Investigation of a high-count-rate energy-dispersive X-ray CT system using a CdTe detector and a high-speed comparator and its application to iodine K-edge imaging
Investigation of a high-count-rate energy-dispersive X-ray CT system using a CdTe detector and a high-speed comparator and its application to iodine K-edge imaging
复制标题
使用CdTe探测器和高速比较器的高计数率能量色散X射线CT系统的研究及其在碘K边缘成像中的应用
DOI：
10.11318/mii.29.56
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发表时间：
2012
影响因子：
1.4
通讯作者：
J. Onagawa
中科院分区：
文献类型：
--
作者：
Yuich Sato;E. Sato;S. Ehara;Yasuyuki Oda;Osahiko Hagiwara;H. Matsukiyo;Akihiro Osawa;Toshiyuki Enomoto;Manabu Watanabe;S. Kusachi;Shigehiro Sato;A. Ogawa;J. Onagawa
能量色散X射线计算机层析成像(ED-CT)系统可用于单色成像。为了进行ED-CT，我们研制了一台扫描速度为25 mm/S、能量分辨率为5keV的振荡型线阵碲化镉探测器。CT是通过物体的重复线性扫描和旋转来执行的。来自物体的穿透X射线光子由镉镉探测器探测，X射线光子的事件信号由电荷敏感和整形放大器产生。较低的光子能量由比较器装置确定，60keV的最大光子能量对应于管电压。来自比较器的逻辑脉冲由计数器卡计数。ED-CT的管电压和电流分别为60kV和0.4 mA，离源1.0m处的X射线强度为16.7uGy·S。最小X射线曝光时间为5min，并通过选择能量范围为35~60keV的光子进行增强碘K边X射线CT演示。
An energy-dispersive X-ray computed tomography (ED-CT) system is useful for carrying out monochromatic imaging. To perform ED-CT, we developed an oscillation linear cadmium telluride (CdTe) detector with a scan velocity of 25 mm/s and an energy resolution of 5 keV. CT is performed by repeated linear scans and rotations 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 using charge-sensitive and shaping amplifiers. The lower photon energy is determined by a comparator device, and the maximum photon energy of 60 keV corresponds to the tube voltage. Logical pulses from the comparator are counted by a counter card. For the ED-CT, the tube voltage and the current were 60 kV and 0.40 mA, respectively, and X-ray intensity was 16.7 µGy/s at 1.0 m from the source. The minimum X-ray exposure time was 5 min, and demonstration of enhanced iodine K-edge X-ray CT was carried out by selecting photons with energies ranging from 35 to 60 keV.
影响因子：
3.6
作者：
Huo, Qingkai;Yuasa, Tetsuya;Dilmanian, F. Avraham
通讯作者：
Dilmanian, F. Avraham
影响因子：
2.5
作者：
Takeda, Tohoru;Wu, Jin;Akatsuka, Takao
通讯作者：
Akatsuka, Takao