Patent ID: 7996062

Claim:
A method, comprising: acquiring and displaying a first MR image of one or more blood vessels between an insertion site for a catheter and a targeted location for the catheter, where the first MR image depends on an MR mechanism that darkens an MRI image of blood; monitoring movement of a tip of the catheter; causing a magnetic resonance contrast agent to be introduced into the blood vessel through the catheter; acquiring and displaying a second MR image of the blood vessels between the catheter and the target location, the acquiring being coordinated with the MR agent delivery, where the second MR image depends on delivery parameters of a contrast agent that enhances the brightness of an MR image of blood; and determining the location of the tip of the catheter relative to a targeted location in a blood vessel of a subject based, at least in part, on one or more of, the first MR image and the second MR image.