| 摘要 |
A tomographic system (200, 800, 900, 1000) includes a gantry (202, 1002) having an opening (242, 816, 916, 1004) for receiving an object (214, 818, 918, 1016) to be scanned, a radiation source (204, 824, 966, 1006), a detector (206, 804, 902, 1008) positioned to receive radiation from the source (204, 824, 966, 1006) that passes through the object (214, 818, 918, 1016), and a computer (224, 810, 958). The computer (224, 810, 958) is programmed to acquire a plurality of projection datasets of the object (104), define a temporal subset of projection datasets from the plurality of projection datasets (106), reconstruct a working image of the object using the plurality of projection datasets (110), identify a region of motion (312, 314, 316, 318) in the working image (112), and minimize motion artifacts in the region of motion in the working image using the temporal subset of projection datasets (114). |
