Patent ID: 8277416

Claim:
A contrast media injector system comprising: a drive mechanism movable and engageable to a fluid container to fill or expel fluid therein; circuitry for controlling said drive mechanism in a programmed manner to effect an injection into a patient; and a memory, said circuitry interacting with said memory to store information into and retrieve information from said memory relating to injection sequences to be carried out by said drive mechanism, said memory associating at least a first injection sequence with authentication data, said circuitry being configured to: allow retrieval of said first injection sequence from said memory prior to requiring any said operator authentication by reference to said authentication data; after said first injection sequence has been retrieved from said memory and still prior to requiring any said operator authentication by reference to said authentication data, to allow said first injection sequence to be modified into a first modified injection sequence; after said first injection sequence has been modified, to allow said first injection sequence to be overwritten in said memory by said first modified injection sequence, but only after requiring said operator authentication by reference to said authentication data; allow storage of said first modified injection sequence in said memory without requiring said operator authentication and without overwriting said first injection sequence in said memory.