As a method for making full use of the features of flat panel sensors with a large photosensitive area, there is a cone beam CT that uses a cone beam X-ray source capable of emitting X-rays over a wide area.

The cone beam X-ray source and the flat panel sensor are installed opposite each other with the object positioned in the center. Images of the object are then acquired while the X-ray source and flat panel sensor are rotated at the same speed around the object.

The two-dimensional image data acquired in this way is then reconstructed by a computer to create three-dimensional X-ray transmission images. The cone beam CT can also acquire three-dimensional X-ray images of large objects in a short time by using high-frame-rate flat panel sensor with a large photosensitive area.