Patent ID: 7688937

Claim:
A computed tomography apparatus, comprising: a source of radiation for generating a cone beam of radiation penetrating a volume of interest around an isocenter such that the cone beam is emitted from a first location; and a radiation detector; wherein the source of radiation is adapted such that the first location is displaceable along a first trajectory; wherein the radiation detector extends along a second trajectory; wherein the first trajectory is complete with respect to a sizeable volume around the isocenter; wherein completeness is defined as the set of all planes which intersect both the first trajectory and the sizeable volume around the isocenter; wherein the first and second trajectories are such that a straight line that starts at a point on the first trajectory and passes through the isocenter intersects the second trajectory; and wherein the cone beam that is emitted from the first location is not significantly blocked by a portion of the radiation detector between the first trajectory and the volume of interest.