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作者将1997年1月1日～2月28日来医院应诊,并被怀疑有胃癌的225例分成两组,一组112例,采用常规X线摄影系统检查,另一组为113例采用CCD-DR系统检查。使用400万像素CCD-DR(基于电荷耦合装置的数字X线摄影)系统,由X线发生装置、影像增强器、透视电视摄像机、图像处理器、监视器、激光打印机和一个CCD单元等组成。该系统每秒钟所获得的影像矩阵为2029×2044,每帧影像都将被自动处理,并经数个包括γ校正在内的计算机算法完善。高分辨率的监视器可以持续观察,激光打印机也可以随时进行影像的硬拷贝,另外,该
The authors came to the hospital from January 1 to February 28, 1997. Two hundred and fifty-five suspected cases of gastric cancer were divided into two groups. One group consisted of 112 patients. The patients underwent conventional radiography and the other group used CCD. -DR system check. It uses a 4-megapixel CCD-DR (digital radiography device based on a charge-coupled device) system and consists of an X-ray generator, an image intensifier, a see-through television camera, an image processor, a monitor, a laser printer, and a CCD unit. The image matrix obtained per second of the system is 2029×2044, and each frame of image will be automatically processed and perfected by several computer algorithms including gamma correction. High-resolution monitors allow continuous observation, and laser printers can also make hard copies of images at any time.