US 10,209,333 B2 · Magnetic resonance imaging method using T2* mapping based on echo planar imaging

Abstract

A flipped fitting method that performs a flipped curve fitting on a maximum of 256 MRI images obtained at different echo times using an EPI image which obtains a plurality of MRI images at a plurality of different echo times within a TR period after application of an excitation RF pulse. Then, T2* values are fitted based on a sufficient amount of acquired TE images, such that it is possible to provide much more accurate T2* values than these provided by underestimated or overestimated fitting by the existing method which is based on only 12 images and to obtain rapid and accurate data without nerve stimulation or acoustic noise. Further, the flipped fitting method is more suitable and accurate for showing the real T2* values.

Claims13

Dependent claims

A method for acquiring a plurality of images using a magnetic resonance imaging system, comprising:

applying an excitation RF pulse;
obtaining 256 MRI images at a plurality of echo times following application of the excitation RF pulse;
performing a curve fitting procedure in reverse order to an order of the image obtaining on T2* values derived from the 256 MRI images to generate a T2* map;
and
outputting the T2* map.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/432,209Filed 1 Apr 2014

Priority

KR 10-2014-00130805 Feb 2014

Published

US 2016/0041244 A111 Feb 2016

Granted

19 Feb 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G01R 33/50
NMR imaging systems: based on the determination of relaxation times , e.g. T1 measurement by IR sequences; T2 measurement by multiple-echo sequences
A61B 2576/00
Medical imaging apparatus involving image processing or analysis
G01R 33/482
MR characterised by data acquisition along a specific k-space trajectory or by the temporal order of k-space coverage, e.g. centric or segmented…:…
G01R 33/4835
Using spatially selective excitation of the volume of interest, e.g. selecting non-orthogonal or inclined slices: of multiple slices

Magnetic resonance imaging method using T2* mapping based on echo planar imaging

Life of this patent

Magnetic resonance imaging method using T2* mapping based on echo planar imaging

Life of this patent

Abstract

Claims13