The invention provides a flat-panel CT
machine, which comprises a
ray emitter and a flat-panel
detector and adopts 360-degree scanning or 180-degree scanning. The length and width of a flat-panel
detector are larger than those of a DSA flat-panel
detector, the flat-panel detector can cover a single part of a
human body, and
spiral scanning is not needed any more. The scanning time is greatly shortened, and
motion artifacts can be effectively reduced; the
irradiation dose of a patient is greatly reduced; the spatial resolution and the number of longitudinal scanning
layers are greatly improved,and gapless scanning is achieved. An X-
ray emission
pulse control technology is adopted, so that data obtained by the CT
machine is complete and free of loss, and images are clearer. The scanning frequency is reduced by half through a
pulse control technology or a 180-degree scanning mode; the requirement on the mobility of a
thin film transistor of the detector can be reduced by about 10 times by a
pulse control technology; the frequency is further reduced by redesigning the
array element number of the detector, and the inversion frequency of a
ray emitter is controlled within an achievablerange, so that the CT
machine has the possibility of practical application.