Abstract: A system and method for tracking or otherwise determining positioning of an intracorporeal device is provided. The invention includes a device that may be inserted into a subject and tracked based on an imageable tag included with the device. The imageable tag is at least partially formed of a substance whose nuclei precess at a Larmor frequency different than the Larmor frequency of hydrogen when subjected to a polarizing magnetic field. MR data may be acquired from the imageable tag using an RF receiver tuned to the Larmor frequency of the substance and used to track movement of the device within the subject.

Abstract: Various pathophysiological states are determined by evaluating the rate of 17O-containing water production oxygen using proton MRI. The method can be used to identify viable but threatened myocardium, injured by viable muscle, penumbra tissue in a stroke patient, and the like.

Abstract: A system and method for tracking or otherwise determining positioning of an intracorporeal device is provided. The invention includes a device that may be inserted into a subject and tracked based on an imageable tag included with the device. The imageable tag is at least partially formed of a substance whose nuclei precess at a Larmor frequency different than the Larmor frequency of hydrogen when subjected to a polarizing magnetic field. MR data may be acquired from the imageable tag using an RF receiver tuned to the Larmor frequency of the substance and used to track movement of the device within the subject.

Abstract: Techniques for reducing the scan time required for the acquisition of two or more magnetic resonance imaging images of a subject having differing contrasts. In one arrangement, a combo acquisition protocol of N sets of parameters is selected prior to imaging. In order to image a subject, a first set of parameter values is selected from the protocol, a first RF pulse and at least one gradient field are used to excite the subject, a refocusing RF pulse and at least one gradient field is applied to the subject, a phase encoding gradient field is applied to the subject, and then a measurement gradient field is applied to the subject simultaneously while an induced signal is measured. The process is repeated to obtain N measurements, which are then processed into two or more reconstructed images of differing contrast, and where some of the measurements are used during the reconstruction of two or more of the images.