1. A system control for a diagnostic imaging apparatus comprising: a user interface adapted to permit a user to enter data specific to a given scan; a scan subject monitor configured to monitor at least one dynamic scan subject parameter; a scan protocol module connected to receive data entered by the user on the user interface and the at least one dynamic scan subject parameter and programmed to prescribe a scan protocol to optimize contrast enhancement; a contrast delivery device controlled by the scan protocol module to cause a contrast agent to be delivered to a scan subject in accordance with the prescribed scan protocol; and an acquisition control configured to coordinate commencement of the given scan in accordance with the scan protocol.