Method and magnetic resonance apparatus for reducing distortion in diffusion imaging

A technology of magnetic resonance equipment and magnetic resonance images, applied in the fields of application, measurement of magnetic variables, medical science, etc., can solve problems such as long measurement time, and achieve the effect of reducing measurement time, saving optimization methods, and accurately correcting
CN102279375AActive Publication Date: 2011-12-14SIEMENS HEALTHCARE GMBH
4 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN Ā· China
Patent Type
Applications(China)
Current Assignee / Owner
SIEMENS HEALTHCARE GMBH
Publication Date
2011-12-14

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a method for reducing distortions in diffusion imaging, comprising the steps of: carrying out at least one first measurement (R1) with a first diffusion weight each for a plurality of spatially separated layers; A plurality of spatially separated layers each carry out at least one second measurement (R2) with a second diffusion weight; determining a distortion correction function and determining correction parameters from said measurements (R1, R2) for weighting the diffusion Distortion correction is performed on the magnetic resonance image of the MRI image, wherein the image information and / or correction parameters of different layers are correlated with each other; and the distortion correction of the diffusion-weighted magnetic resonance image is performed based on the distortion correction function and the correction parameter. Furthermore, the invention proposes a magnetic resonance system (1) that can be used to carry out such a method.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a method for correcting image distortions that may occur in taking a diffusion-weighted magnetic resonance image (hereinafter also referred to as "MR image"), and to a magnetic resonance apparatus that can be used to perform such a method ( Hereinafter also referred to as "MR device"). Background technique

[0002] In diffusion imaging, a plurality of images with different diffusion directions and diffusion weights are usually recorded and combined with one another. The magnitude of the diffusion weights is mostly determined by the so-called "b-value". Diffusion images with different diffusion directions and diffusion weights or images combined from these diffusion images can thus be used for diagnostic purposes. A particularly diagnostically convincing parameter table, such as a table reflecting the "apparent diffusion coefficient (ADC)" or the "fractional anisotropy value (FA)", can thus be generated by an appropria...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More