Patent ID: 6970533

Claim:
A scanning-based radiation detector apparatus for recording a two-dimensional image of an object comprising: a one-dimensional detector unit exposed to a fan-shaped beam of ionizing radiation as transmitted through or scattered off said object, and arranged for repeated one-dimensional imaging of said fan-shaped beam of ionizing radiation, said fan-shaped beam of ionizing radiation having a thickness when impinging on said one-dimensional detector unit; and a device for moving said one-dimensional detector unit and said fan-shaped beam of ionizing radiation relative said object while said one-dimensional detector unit is arranged to repeatedly detect to thereby create a two-dimensional image of the object, wherein said one-dimensional detector unit has an ionizing radiation sensitive thickness, which is larger than the thickness of said fan-shaped beam of ionizing radiation; and said apparatus comprises a control device for controlling the repeated detections by said one-dimensional detector unit to obtain a one-dimensional image of said fan-shaped beam of ionizing radiation at every n'th length unit of the movement, where n is not lower than essentially half the thickness of said fan-shaped beam of ionizing radiation in said length unit, but lower than the thickness of said fan-shaped beam of ionizing radiation in said length unit.