DEMONSTRATION OF MEGAVOLTAGE AND DIAGNOSTIC-X-RAY IMAGING WITH HYDROGENATED AMORPHOUS-SILICON ARRAYS
DEMONSTRATION OF MEGAVOLTAGE AND DIAGNOSTIC-X-RAY IMAGING WITH HYDROGENATED AMORPHOUS-SILICON ARRAYS
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DOI：
10.1118/1.596802
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发表时间：
1992-11-01
期刊：
影响因子：
3.8
通讯作者：
STREET, RA
中科院分区：
文献类型：
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作者：
ANTONUK, LE;BOUDRY, J;STREET, RA
作者正在开发由氢化非晶硅 (a-Si:H) 制成的第一个大面积、自扫描、像素化固态阵列组成的平板成像仪，用于诊断 X 射线和兆伏放射治疗成像。该阵列以多元件非晶硅探测器阵列的缩写 MASDA 表示，由 a-Si:H 光电二极管和薄膜晶体管的二维阵列组成，并与闪烁材料结合使用。与现有技术相比，使用 MASDA 阵列的成像仪具有多种优势。本文介绍了使用多个此类阵列拍摄的初始兆伏电压和诊断质量的 X 射线图像，包括解剖幻影图像的第一个示例。概述了获得此类图像所需的外部读出电子设备和成像技术，简要回顾了阵列的结构、操作和优点，并讨论了这项新技术的未来潜力。
Flat-panel imagers consisting of the first large area, self-scanning, pixelated, solid-state arrays made with hydrogenated amorphous silicon (a-Si:H) are under development by the authors for applications in diagnostic x-ray and megavoltage radiotherapy imaging. The arrays, designated by the acronym MASDA for multi-element amorphous silicon detector array, consist of a two-dimensional array of a-Si:H photodiodes and thin-film transistors and are used in conjunction with scintillating materials. Imagers utilizing MASDA arrays offer a variety of advantages over existing technologies. This article presents initial megavoltage and diagnostic-quality x-ray images taken with several such arrays including the first examples of anatomical-phantom images. The external readout electronics and imaging techniques required to obtain such images are outlined, the construction, operation, and advantages of the arrays briefly reviewed, and the future potential of this new technology discussed.