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

Active Publication Date: 2011-12-14
SIEMENS HEALTHCARE GMBH
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Problems solved by technology

However, in this method the measurement time is relatively long due to the additional calibration measurement

Method used

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  • Method and magnetic resonance apparatus for reducing distortion in diffusion imaging
  • Method and magnetic resonance apparatus for reducing distortion in diffusion imaging
  • Method and magnetic resonance apparatus for reducing distortion in diffusion imaging

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Embodiment Construction

[0061] exist figure 1 A magnetic resonance system 1 according to the invention is shown roughly schematically in . The magnetic resonance system includes, on the one hand, the actual magnetic resonance scanner 10 with an examination chamber or patient passage into which an examination object 12 (here a patient or test object) can enter on a couch 11 . The magnetic resonance scanner 10 generally has a basic field magnet system, a gradient coil system and a transmitting and receiving antenna system, the latter comprising, for example, a whole-body coil fixedly installed in the magnetic resonance scanner 10 and optionally other, variably arranged The local coil on the object 12 is examined.

[0062] The MR system 1 also has a central control unit 13 for controlling the entire MR system 1 . The central control unit 13 includes an image capture unit 14 for controlling the pulse sequence. The sequence of radio-frequency pulses and gradient pulses is controlled in the image acquis...

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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.

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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/565A61B5/055
CPCG01R33/4835G01R33/56518G01R33/56341
Inventor 索斯滕.费韦尔托尼.H.金戴维.A.波特
Owner SIEMENS HEALTHCARE GMBH
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