Characterization of X-Ray Imaging Properties of PbI 2 Films
Characterization of X-Ray Imaging Properties of PbI 2 Films
复制标题
DOI：
10.1557/proc-487-351
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
K. Shah;P. Bennett;L. Cirignano;Y. Dmitriyev;M. Klugerman;K. Mandal;L. Moy;R. Street
中科院分区：
文献类型：
--
作者：
K. Shah;P. Bennett;L. Cirignano;Y. Dmitriyev;M. Klugerman;K. Mandal;L. Moy;R. Street
本文介绍了近年来研制用于X射线成像的真空升华碘化铅薄膜的研究情况。碘化铅薄膜由于其低暗电流、高阻止效率、相当好的电荷传输、低成本和相对容易放大而有希望用于该应用。碘化铅薄膜（高达5 × 5 cm{sup 2}面积）已生长，并通过测量其X射线成像特性，如空间分辨率和对比度传递函数。用PbI{sub 2}膜记录了极好的空间分辨率（> 10 1 p/mm，具有高CTF {approx} 50%）。还测量了相关的检测特性，例如给定X射线能量的信号幅度，并且发现与用于X射线成像的标准荧光屏相比大约10倍。这些薄膜的电荷传输和定时特性进行了测量，结果表明，这些薄膜应该能够实时操作。这些电影的X射线成像，如乳房X线摄影，荧光透视，X射线衍射的应用得到解决。
This paper describes the recent research in developing vacuum sublimed lead iodide films for X-ray imaging. Lead iodide films are promising for this application due to their low dark current, high stopping efficiency, reasonably good charge transport, low cost, and relatively easy scale-up. Lead iodide films (up to 5 x 5 cm{sup 2} area) have been grown and characterized by measuring their X-ray imaging properties such as spatial resolution, and contrast transfer function. Excellent spatial resolution (> 10 1p/mm with high CTF {approx} 50%) has been recorded with PbI{sub 2} films. Relevant detection properties such as signal amplitude for given X-ray energy has also been measured and was found to be about 10 times larger as compared to standard phosphor screens used for X-ray imaging. Charge transport and timing characteristics of these films have been measured and the results indicate that these films should be capable of real-time operation. Application of these films for X-ray imaging such as mammography, fluoroscopy, and X-ray diffraction is addressed.