SYSTEM AND METHOD FOR SPIRAL MULTISLAB MAGNETIC RESONANCE IMAGING

摘要

A magnetic resonance imaging (MRI) system and method for controlling the MRI system is provided. The method includes directing the MRI system to perform a pulse sequence that includes generating a RF excitation pulse to excite spins in slice locations within a selected slab to produce an echo train from the slab that is formed by a plurality of echoes. The sequence also includes applying a slice-encoding gradient to spatially encode echoes associated with a different slice in the slab, and applying readout gradients during the echo train to acquire MR data from the slab, the readout gradients including a first sampling strategy defining a spiral-in k-space trajectory and a second sampling strategy defining a spiral-out k-space trajectory, wherein the MRI system is directed to repeat the sequence such that a plurality of subsequent selected slabs are excited and MR data is acquired therefrom.

主权项

1. A method for controlling a magnetic resonance imaging (MRI) system, the method comprising:
directing the MRI system to perform a pulse sequence that, in a given repetition time (TR), includes:
(i) generating a RF excitation pulse to excite spins in a plurality of slice locations within a selected slab to produce an echo train from the selected slab that is formed by a plurality of echoes;(ii) applying a slice-encoding gradient to spatially encode each of the plurality of echoes associated with a different slice in the selected slab; and(iii) applying readout gradients during the echo train to acquire MR data from the selected slab, the readout gradients including a first sampling strategy that defines a spiral-in k-space trajectory and a second sampling strategy that defines a spiral-out k-space trajectory; wherein, for each TR, the MRI system is directed to repeat the pulse sequence such that each of a plurality of subsequent selected slabs is excited and MR data is acquired from each of the plurality of subsequent selected slabs.