| 主权项 |
1. A system comprising:
a detector comprising multiple pixels configured to detect computed tomography (CT) events and nuclear medicine (NM) imaging events, the CT events corresponding to X-rays emitted from a X-ray source through an object to be imaged, the NM imaging events corresponding to gamma rays emitted from a radiopharmaceutical that has been administered to the object, the detector configured for photon counting detection of the CT events and the NM imaging events, wherein the detector is configured to detect the CT events and the NM events concurrently, wherein the detector and the X-ray source are configured to rotate about the object to be imaged; an asymmetrically disposed cone beam collimator positioned proximate the object and configured to be focused on the X-ray source, wherein the asymmetric cone beam collimator is disposed at a shorter distance from the object than a distance from the X-ray source to the object; and a processing unit comprising at least one processor and at least one memory comprising a tangible and non-transitory computer readable storage medium, the processing module configured to, based on corresponding energy levels of the CT events and the NM imaging events, identify CT information corresponding to the CT events and identify NM information corresponding to the NM imaging events. |
