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

X射线管是一种近贴聚焦线性X射线影像增强器。而TDI（时间延迟积分）线扫描相机是一种专门设计的多线传感器，通过特殊的机构使一条线多次曝光。TDI线阵相机具有CCD传感器，其具有由1024个像素组成的64条线。一条线被曝光，其电荷被转移到下一条线，并再次曝光。在该操作的64次迭代之后，输出一行视频信号。该序列并行执行约64行。当电子电荷的移动与场景移动适当地同步时，场景内的每条线被曝光64次。这种同步多次曝光的方式可以获得64倍的光增益，而不会产生运动模糊，因此，将TDI相机和X射线管相结合是获得更大光增益的最佳选择之一。全景层析成像是一种扫描成像和层析成像的结合，TDI相机可以获得具有层析成像效果的全景图像。这种TDI相机和X射线管相结合的传感器可以安装在传统的全景相机上。全景图像拍摄约1000 × 1800像素。采用反锐化掩模技术和灰度变换对图像进行处理，并对另一种X线传感器和双能X线吸收法进行了研究。这些项目正在开发中。

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.