Patent ID: 7848480

Claim:
An X-ray CT scanner comprising: a plurality of X-ray tubes including a first X-ray tube having a first fan angle and a second X-ray tube having a second fan angle larger than the first fan angle; a plurality of X-ray detectors which are respectively arranged to face the first X-ray tube and the second X-ray tube and include a first X-ray detector and a second X-ray detector having detection elements; a collection data processing section which cuts out and omits from the plurality of pieces of collection data, pieces of (1) data simultaneously collected by the first X-ray detector and the second X-ray detector from a first imaging field of view covered by the first X-ray detector in accordance with each segment and (2) data collected by the second X-ray detector from a region in a second field of view covered by the second X-ray detector outside the first imaging field of view so that the first and second collection data each have respective defective portions corresponding to regions outside the respective imaging fields of view of the first and second X-ray tubes, and smoothly executes weighting processing with respect to remaining pieces of collection data including first collection data obtained by the first X-ray detector and second collection data obtained by the second X-ray detector in a direction corresponding to a channel direction of the detection elements of the plurality of X-ray detectors; and a first image generating section which performs image reconstruction processing with respect to the first and second collection data weighted by the collection data processing section to generate complete image data, comprising, a first image reconstructing section that performs image reconstruction processing with respect to the first collection data weighted by the collection data processing section to generate first intermediate image data, a second image reconstructing section that performs image reconstruction processing with respect to the second collection data weighted by the collection data processing section to generate second intermediate image data, and a combining section that combines the first intermediate image data with the second intermediate image data to generate the complete image data.