Back to results
US 11,009,576 B2Granted
Method for magnetic resonance imaging using slice quadratic phase for spatiotemporal encoding
AssigneeRegents of the University of Minnesota
InventorsSteen Moeller, Mehmet Akcakaya
Life of this patent
Estimating the term…
Abstract
Described here are systems and methods for volumetric excitation in magnetic resonance imaging (“MRI”) using frequency modulated radio frequency (“RF”) pulses. In general, quadratic phase modulation along the slice encoding direction is implemented for additional spatiotemporal encoding, which better distributes signal content in the slice direction and enables higher acceleration rates that are robust to slice-undersampling.
Claims19
A method for imaging a subject with a magnetic resonance imaging (MRI) system, the steps of the method comprising:
- (a) providing a radio frequency (RF) excitation waveform to the MRI system, wherein the RF excitation waveform defines a frequency-swept RF excitation with a quadratic phase profile;
- (b) acquiring data from a subject using the MRI system and a pulse sequence that includes the provided RF excitation waveform;
- and
- (c) reconstructing an image of the subject from the acquired data, wherein reconstructing the image comprises using a reconstruction algorithm in which the quadratic phase profile of the RF excitation waveform is used as a parameter during reconstruction of the image to remove slice-specific phase contributions along a slice encoding direction of the acquired data before performing at least one of phase correction or signal interpolation on the acquired data, and wherein the quadratic phase profile of the RF excitation waveform provides additional spatial encoding information.
1 more element
Dependencies are inferred from the claim text.