Development of the image processing system and the methods of image processing in cineradiography

我们设计并开发了一个数字图像处理系统。电视摄像机被用作电影射线照相机的每帧中的X射线图像的输入设备。使用A/D转换器将图像数字化，并通过图像处理单元或计算机进行处理。处理后的图像存储在硬盘中，然后在CRT显示器上连续显示。由于图像处理的不同方法，我们研究了提高图像质量的可能性。我们发现，从这个系统获得的图像的清晰度降低了电视摄像机使用，它的减少影响了数字图像的图像质量。因此，使用高分辨率胶片数字化仪（激光扫描仪）来获得数字图像，而不是电视摄像机。我们可以得出结论，电视摄像机是没有用的医学X射线图像的边缘增强，作为临床检查的结果，使用反锐化掩模技术与对数转换的边缘增强是有效的电影射线照片。此外，动画的制作也是有效的和有启发性的，这些处理可能对提高电影放射摄影的诊断能力是相当有用的。

We designed and developed a digital image processing system. A TV camera was used as an input device of an x-ray image in each frame of cineradiographs. The images were digitized using a A/D converter and processed by an image processing unit or a computer. The processed images were stored in a hard disc unit, and then displayed continuously on a CRT display.Since images were processed with different ways, we investigated a possibility of the improvement of image quality.We found the sharpness of the images obtained from this system was reduced by a TV camera used and its reduction affected the image quality of the digital images. Therefore, a high resolution film digitizer (laser scanner) was used to get digital images instead of a TV camera. One can conclude that a TV camera is not useful to digitize the medical x-ray images.As a result of clinical examinations, edge enhancement by using unsharp masking technique with logarithmic conversion was effective for cineradiographs. In addition, the construction of the animation was also effective and stimulative.These processing might be quite useful to improve the diagnostic capability in cineradiography.