Abstract: A fourth-generation X-ray CT scanner device comprises an X-ray tube for irradiating X-rays in a sector form to an object while moving on a circular orbit around the object, an annular X-ray detector array disposed coaxially with and inside the circular orbit of the X-ray tube and arranged to surround the object, for detecting the X-rays which have been irradiated from the X-ray tube and passed through the object for each channel, and a reconstruction unit for acquiring an output of the detector array to effect the reconstruction process and create a tomographic image. The X-ray array is formed of a large number of solid-state X-ray detectors and a plurality of the detectors constitute a detector module, and the array includes a large number of modules.

Abstract: In an X-ray computerized tomographic apparatus for utilizing a Scanographic scanning operation prior to a CT scanning operation, it is desirable to designate a plurality of CT scanning portions of the patient by using a horizontal line on a display screen where intervals between successive lines are freely adjustable in accordance with the portions of the patient's body which will receive the CT scanning. To this end, there is provided a converting means for converting the X-ray data from a detector array into actual position data for the patient who will be scanned in the CT mode.