DIGITAL RADIOGRAPHIC IMAGING-SYSTEM WITH MULTIPLE-SLIT SCANNING-X-RAY BEAM - PRELIMINARY-REPORT
DIGITAL RADIOGRAPHIC IMAGING-SYSTEM WITH MULTIPLE-SLIT SCANNING-X-RAY BEAM - PRELIMINARY-REPORT
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DOI：
10.1148/radiology.161.2.3763924
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发表时间：
1986-11-01
期刊：
影响因子：
19.7
通讯作者：
CHAN, HP
中科院分区：
文献类型：
--
作者：
DOI, K;FUJITA, H;CHAN, HP
描述了一种采用新型扫描 X 射线管、多缝组件 (MSA) 和图像增强器 (II)-TV 数字系统的数字成像系统。使用 MSA 可以将 X 射线利用率比单缝系统提高 100 倍。通过从多个多缝图像合成最终图像，可以大大减少散射和杂光，从而提高对比灵敏度。实验原型系统由传统 X 射线管和与 MSA 机械扫描结合使用的 II-TV 数字系统组成。使用铝阶梯楔测量的衰减曲线表明，这种方法消除了散射和杂光。模型的重建图像优于传统宽光束曝光获得的图像。讨论了与扫描 X 射线管和用于采集胸部图像的数字系统的设计相关的物理参数。
A digital imaging system that employs a novel scanning x-ray tube, a multiple-slit assembly (MSA), and an image intensifier (II)-TV digital system is described. Use of the MSA can increase x-ray utilization by a factor of 100 over that obtained with single-slit systems. Scatter and veiling glare can be reduced substantially by synthesizing the final image from a number of multiple-slit images, resulting in improvement in contrast sensitivity. An experimental prototype system consisted of a conventional x-ray tube and an II-TV digital system used in conjunction with mechanical scanning of the MSA. Attenuation curves measured with an aluminum stepwedge showed that scatter and veiling glare were eliminated by this approach. Reconstructed images of phantoms were superior to images obtained with conventional wide-beam exposure. Physical parameters related to design of the scanning x-ray tube and a digital system for acquiring images of the chest are discussed.