Patent ID: 8548117

Claim:
A computed tomography method using a radiation detector and a radiation source, both mounted on a support, the support rotatable around a rotational axis; the method comprising: a) creating a first displacement by laterally displacing the radiation detector from a position with centered detector geometry with a centered transverse field of view to a first offset position, said detector being at a first rotational orientation with respect to said axis; b) with said detector at said first orientation, emitting first radiation by the radiation source, and detecting the first radiation by the radiation detector; and acquiring projection data indicative of the first radiation; c) halting the emitting of the first radiation, and transitioning to a second rotational orientation of said radiation detector by rotating the support around the rotational axis by 180°; d) at said second rotational orientation, emitting second radiation by the radiation source, and detecting the second radiation by the radiation detector; and acquiring projection data indicative of the second radiation; e) laterally displacing the radiation detector from the first offset position to a second offset position, with opposite direction and double length of the first displacement and so as to assume a third rotational orientation of said radiation detector; f) at said third rotational orientation, emitting third radiation by the radiation source, and detecting the third radiation by the radiation detector; and acquiring projection data indicative of the third radiation; g) halting the emitting of the third radiation, and transitioning to a fourth rotational orientation of said detector by rotating the support around the rotational axis by 180°; h) at said fourth rotational orientation emitting fourth radiation by the radiation source, and detecting the fourth radiation by the radiation detector; and acquiring projection data indicative of the fourth radiation.