A Development of Digital Panoramic Radiography using X-Ray CCD Sensor and Parallel Image Processor.

PLI管是一种近距聚焦的线阵X射线像增强器。而TDI(时延积分)线扫描相机是一种专门设计的，通过传感器中的多条线的特殊机构将一条线箭头多次曝光的相机。TDI线相机有一个ccd传感器，它的线由1024个像素组成。一条线被曝光，它的电荷被转移到下一条线，然后再次曝光。在此操作的迭代之后，输出单行视频信号。这个序列是围绕线平行执行的。当电子电荷的移动与场景移动适当同步时，场景内的每一行都被单独曝光几次。这种同步多次曝光可以在没有运动模糊的情况下获得倍的光增益。PLI管和TDI相机的组合可能是获得大量光增益的最佳选择之一。全景层析成像是一种兼具扫描和层析效果的全景图像，TDI相机可以生成具有层析效果的全景图像。这种PLI管和TDI相机的组合传感器安装在传统的全景机上。全景图像是用大约1000x1800像素拍摄的。利用反锐化掩模技术和灰度变换对图像进行了处理，并对另一种类型的X射线传感器和双能X射线吸收法进行了研究。这些项目目前正在开发中。

PLI-tube is a proximity-focussed linear X-ray image intensifier. And TDI (time delay integration) line scan camera is a specially designed to arrow a single line to be exposed multiple times by special mechanism with multiple lines in the sensor. TDI line camera has a CCD sensor which have 64 lines composed of 1024 pixels. A single line is exposed, and its charge is transferred to the next line, and exposed again. After 64 iterations of this operation, a single line of video signal is outputted. This sequence is performed in parallel about 64 lines. When the shift of electronic charge is properly synchronized with scene movement, each line within a scene is exposed 64 separate times. This synchronous multiple exposure results in a 64 times light gain without the motion blur.The combination of PLI-tube and TDI camera might be one of the best choice to get a great amount of light gain.Panoramic tomography is a kind of both scanography and tomography, TDI camera makes a panoramic image with tomographic effect.This combination sensor of PLI-tube and TDI camera is equipped on the conventional panoramic machine. Panoramic image was taken with about 1000x 1800pixels. The image was processed using unsharp mask technique and gray scale transformation.Another type of X-ray sensor and dual energy X-ray absorptiometry was also investigated. These items are under developping now.