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Catalytic multi-echo phase unwrapping method

A phase and echo technology, applied in the field of catalytic multi-echo phase unwrapping

Active Publication Date: 2016-12-28
SPINTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the region-growing phase-unwrapping method is not always reliable, and conventional homodyne high-pass filtering induces unwanted artifacts

Method used

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  • Catalytic multi-echo phase unwrapping method
  • Catalytic multi-echo phase unwrapping method
  • Catalytic multi-echo phase unwrapping method

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Embodiment Construction

[0042] refer to figure 1 , illustrating a process 100 for generating MR images with reduced or eliminated phase aliasing. In step 101 , MR imaging data are acquired at a series of different echo times, for example using a multi-echo gradient echo (GRE) or gradient echo planar scan. The imaging data obtained by each scan can include amplitude information ρ(r) and phase information (As used herein, r is a spatial variable ranging over the imaging region). The imaging data may be represented as a matrix with 1, 2, 3 or more dimensions for each echo time.

[0043] In step 103, the MR data are processed (eg, by applying a Fourier transform) to produce a magnitude image and a phase image (and / or a combined complex image) for each echo time. The image can be a one-dimensional image, a two-dimensional image or a three-dimensional image. The image may be a digital image made up of pixels (or voxels in the three-dimensional case). It should be understood that, as used herein, the...

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Abstract

The invention discloses a method of performing nuclear magnetic resonance imaging on an object, the method comprising: receiving MR data including amplitude information and phase information generated using MR scans having different echo time series; generating one or more measured MR images from the MR data; and processing the measured MR images to generate alias-free phase information or substantially alias-free phase information for at least one pixel in the images.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 481,687, filed May 2, 2011, which is hereby incorporated by reference in its entirety. Background technique [0003] Magnetic resonance (MR) imaging is a useful non-invasive method for imaging interior parts of a large number of subjects. Its non-invasive imaging of tissues in living organisms, especially humans, is highly valued in the medical field. [0004] Phase information obtained in MR imaging applications can include valuable information for use in a number of imaging techniques including susceptibility-weighted imaging of the type described in U.S. Patent No. 6,658,280, issued December 2, 2003 technology, the entire content of this U.S. patent is incorporated herein by reference. [0005] However, phase-based MR imaging techniques can suffer from unwanted artifacts caused by phase convolution or aliasing. For example, SWI typically util...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/175
CPCG01R33/56545G01R33/5615
Inventor 马克·E·哈克冯伟
Owner SPINTECH