US 2015/0309142 A1 · Apparatus And Method For Multi-Band MR Imaging

Abstract

A magnetic resonance method and system are provided for providing improved multi-band (MB) magnetic resonance imaging. The adaptive MB imaging can be achieved by providing one or more modified multi-band excitation pulse sequences that include at least either one nullified “dummy” slice within a slab that is not excited simultaneously with the other slices during a single multislice acquisition sequence, or one excitation slice group that utilizes a non-uniform slice spacing between simultaneously excited slices. Adaptive GRAPPA or slice-GRAPPA kernel sizes can also be used during image reconstruction to improve speed without excessive point spread blurring or MB reconstruction failure. A total leakage factor (TLF) can also be determined based on test images using modified MB excitation sequences, and used to improve the adaptive MB procedure.

Claims21

Dependent claims

An MR imaging system for generating a multi-band (MB) image of a region of interest, comprising:

a radio frequency (RF) signal generator and a magnetic field gradient generator which are together configured to provide a series of RF pulse and magnetic field gradient sequences for acquisition of MB image data, and
an image processing unit configured to generate the MB image of the region of interest based on the MB image data,
wherein the series of RF pulse and magnetic field gradient sequences comprises at least one adaptive acquisition parameter.

A method for generating a multi-band (MB) magnetic resonance image of a region of interest, comprising the steps of:

(a) providing a series of radio frequency (RF) pulse and magnetic field gradient sequences for acquisition of MB image data using a signal generator and a magnetic field gradient generator, wherein the series of RF pulse and magnetic field gradient sequences comprises an adaptive acquisition parameter;
(b) detecting the MB image data generated by the excited slices using a coil arrangement;
and
(c) generating the MB magnetic resonance image based on the MB image data.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/696,783Filed 27 Apr 2015

Priority

25 Apr 2014

Published

29 Oct 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01R 33/5611
By reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences: parallel magnetic resonance imaging, e.g.…
G01R 33/4835
Using spatially selective excitation of the volume of interest, e.g. selecting non-orthogonal or inclined slices: of multiple slices
G01R 33/56366
Of moving material, e.g. flow contrast angiography: perfusion imaging
G01R
Measuring electric variables

Apparatus And Method For Multi-Band MR Imaging

Life of this patent

Apparatus And Method For Multi-Band MR Imaging

Life of this patent

Abstract

Claims21