Rollback reconstruction for TDC enhanced perfusion imaging

Tomographic perfusion imaging is a significant modality for stroke diagnosis. However, the low rotational speed of C-arm (6–8 s per circle) challenge applying in cone beam computed tomography (CBCT). Traditional reconstruction methods cannot remove artifacts caused by slow or acquire enough sample points to restore time density curve (TDC). This paper presents dynamic rollback method CBCT. The proposed can improve temporal resolution increasing used calculating TDC. Combined with existing techniques, algorithm allows slow-rotating scanners be purposes. In experiments, was compared other algorithms based on standard and interpolation approach. presented could without X-ray exposure contrast agent.