Clinical Application Of High Resolution Digital Image Storage For General Radiography

Images are taken from a 1023 line video television chain coupled to an x-ray image intensifier. The images were captured on either a 512 x 512 pixel digital field store or summed into a 1024 x 1024 pixel frame store. The resultant images could be copied by using a multiformat camera if desired. All images are obtained using conventional fluoroscopic x-ray exposure rates (25 uR/s to the input of the x-ray image intensifier). The image qualities are compared using contrastdetail diagrams and motion modulation transfer functions. It is found that a reasonable compromise between image quality and motion blurring is obtained for four television frame exposures. It is suggested from the results that pulse progressive readout of the camera would permit an even better compromise. Preliminary work on such a system will be discussed. We also discuss the applicability of intensified x-ray television systems for general digital radiography and the requirements necessary for physician acceptance.