Dynamic magnetic resonance angiography
AssigneeHeart Imaging Technologies LLC
InventorsRobert M. Judd, Raymond J. Kim, Enn-Ling Chen
Life of this patent
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Abstract
A method for creating a magnetic resonance angiography (MRA) image including the steps of acquiring a magnetic resonance image in which a predetermined slice is excited using a train of radiofrequency (RF) pulses; and acquiring image data between the RF pulses such that the excited slice is viewable from a side view rather than from a face view. An MRA image generated by the steps of acquiring a magnetic resonance image in which a predetermined slice is excited using a train of radiofrequency (RF) pulses; acquiring image data between the RF pulses; viewing a side view of the slice, including dynamic spins within and exiting the slice.
Claims18
A method for noninvasive angiography, comprising the steps of:
- exciting a predetermined slice of a vascular region to coherently excite protons in fluid moving through the vascular region;
- acquiring at least one magnetic resonance image (MRI) of the vascular region while maintaining phase coherence of the protons;
- and
- projecting the at least one MRI onto a projection plane normal to the slice to view the vascular region within, and downstream of the slice.
A method for noninvasive angiography, comprising the steps of:
- exciting a predetermined slice of a vascular region using a train of radiofrequency (RF) pulses to coherently excite protons in fluid moving through the vascular region;
- acquiring at least one magnetic resonance image (MRI) of the vascular region between the RF pulses while maintaining phase coherence of the protons;
- and
- projecting the at least one MRI onto a projection plane normal to the slice to view the vascular region within, and downstream of the slice.
A method for noninvasive angiography, comprising the steps of:
- creating a refocussing condition while compensating the gradient waveforms for motion by exciting a predetermined slice of a vascular region using a train of radiofrequency (RF) pulses that are in resonance with the frequency at which fluid passes through the slice so as to coherently excite protons in the fluid moving through the vascular region;
- acquiring at least one magnetic resonance image (MRI) of the vascular region between RF pulses while maintaining phase coherence of the protons;
- changing the viewing direction by projecting the at least one MRI onto a projection plane normal to the slice to view the vascular region within, and downstream of the slice;
- and
- viewing the vascular region as a movie formed by repetitive acquisition and projection of the at least one MRI.
Dependencies are inferred from the claim text.