Patent ID: 9159462
Filing Date: 2015-10-13
Classification: A61B,G21K

Abstract:
1. A detection apparatus, the detection apparatus comprising: a radiation source configured to generate a conical radiation beam for traversing a region of interest within an examination zone; a detector with a homogenous detection surface configured to generate detection values being indicative of the radiation beam after having traversed the region of interest; a moving unit configured to move the radiation source and the region of interest relative to each other along a helical trajectory around a rotational axis (R) for allowing the radiation beam to traverse the region of interest in different directions, while the detector generates the detection values; a filter configured to filter and divide the radiation beam into a first contiguous region and a second contiguous region and the first contiguous region having different energy spectra from the second contiguous region, wherein the first contiguous region of the radiation beam illuminates a first detector area on the detection surface, thereby generating a first set of detection values, and the second contiguous region of the radiation beam illuminates a second detector area on the detection surface, thereby generating a second set of detection values, and the filter is non-moving relative to the radiation source; a control unit configured to control the detection apparatus such that the first set of detection values and the second set of detection values are redundant; and wherein the filter is adapted such that the detection apparatus is operable in an acquisition mode in which the sets of detection values are complete data sets that include the region of interest.