ROENTGENOLOGY DEVICE WITH DIGITAL PICTURE DEVICE

摘要

PROBLEM TO BE SOLVED: To improve diagnostic efficiency by providing an algorithm for evaluating a formed image of a phantom in an image computer in an X-ray diagnostic apparatus and searching thereby visible fine parts of the phantom in an X-ray image to form a contrast-fine part-diagram. SOLUTION: An X-ray emitter 1 emits an X-ray beam flux 3 from a focus 2 and makes it passes through a patient 4 placed on a table 5. This X-ray image is detected by means of an image sensor 6 and an image is displayed on a monitor 8 from this output signal through an image computer 7. In this case, for judging the quality of the image, a Plexiglass perforated phantom with a number of holes with various hole diameters and various depths and made of a Plexiglass is used. In addition, in the image computer 7, visible fine parts in the X-ray image are originally searched to detect that by what contrast and size of an object, the fine parts become invisible caused by noises of an imaging device.