A method of automatically determining parameters for a contrast scan, the method comprising obtaining scan-object information, selecting a scan protocol corresponding to a part of at least one part of a scan-object to be scanned from a plurality of scan protocols, each of the plurality of scan protocols corresponds to a part of the at least one part of the scan-object to be scanned and comprises built-in scan parameters, and automatically determining a scan delay and injection parameters with respect to the scan-object and the part of the scan-object to be scanned.
