SYSTEM AND METHOD FOR FULLY PHASE-ENCODED MAGNETIC RESONANCE IMAGING USING MULTIBAND RADIO FREQUENCY EXCITATION

摘要

Systems and methods for simultaneously acquiring three-dimensional data from multiple different frequency bins with a magnetic resonance imaging (“MRI”) system, and without frequency-encoding gradients, are provided. A multiband radio frequency (“RF”) pulse is used to excite spins associated with multiple different resonance frequency offsets, and a fully phase-encoded acquisition is used to acquire data, which may be spectrally-resolved data, from magnetic resonance signals formed in response to the multiband RF pulse.

主权项

1. A method for simultaneously acquiring three-dimensional data from multiple different resonance frequency offsets with a magnetic resonance imaging system, the steps of the method comprising:
directing the MRI system to:
a) produce a multiband radio frequency (RF) pulse that excites spins associated with each of a plurality of different resonance frequency offsets;b) establish a first phase-encoding gradient along a first direction;c) establish a second phase-encoding gradient along a second direction that is orthogonal to the first direction;d) establish a third phase-encoding gradient along a third direction that is orthogonal to the first direction and the second direction; ande) acquire data at a point in k-space that is defined by the first, second, and third phase-encoding gradients by sampling a magnetic resonance signal during a period of time in which no magnetic field gradients are established by the MRI system.