Patent ID: 7467006

Claim:
A magnetic resonance imaging system comprising: static magnetic field generating means for applying a static magnetic field to an object to be examined; gradient magnetic field generating means for applying a gradient magnetic field: RF magnetic field transmitting means for irradiating, to nuclear spins within said object, RF magnetic field pulses to cause nuclear magnetic resonance of the nuclear spins; an echo signal receiving means for detecting an echo signal emitted by the nuclear magnetic resonance; pulse sequence control means for controlling a pulse sequence including at least a repetition time TR as an imaging parameter and executed to receive the echo signal; signal processing means for reconstructing an image of a blood vessel by using the echo signal detected by said echo signal receiving means; and display means for displaying said blood vessel image, wherein, during execution of said pulse sequence, said pulse sequence control means changes a value of the at least said repetition time TR in said pulse sequence depending on a concentration profile of a contrast agent, such that the repetition time has a shorter value during a higher concentration period than a value during a lower concentration period, which has been injected into said object, in said blood vessel.