Magnetic resonance imaging method

Method of MR imaging comprising administering a contrast agent comprising manganese (Mn2+) to the human or non-human animal body before and/or simultaneously with exposing said body to a regimen of physical and/or pharmacological stress, and subjecting said body to an imaging procedure characterised in that a calcium solution is administered to said body after the regimen of physical and/or pharmacological stress and prior to said imaging procedure.