A first X-ray detector (203) is positioned to detect at least the X-rays that intersect the center of rotation (201) for an object (205) with respect to an X-ray source (202). A second X-ray detector (207) is then positioned to detect X-rays that do not overlap with the X-rays as are detected by the first X-ray detector as well as X-rays (210) that intersect a periphery of a circle (209) that circumscribes an outer extreme boundary (208) of the object to be scanned.