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Magnetic resonance imaging device and magnetic resonance imaging method

A technology for magnetic resonance imaging and magnetic resonance data, which is applied to magnetic resonance imaging devices and the field of magnetic resonance imaging, and can solve problems such as the allowable range of image blurring.

Active Publication Date: 2016-06-29
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the case of asymmetric sampling where the degree of asymmetry is relatively small such that 70% or more of the symmetrically sampled data is sampled, the blurring of the image is within the allowable range.

Method used

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  • Magnetic resonance imaging device and magnetic resonance imaging method
  • Magnetic resonance imaging device and magnetic resonance imaging method
  • Magnetic resonance imaging device and magnetic resonance imaging method

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Embodiment Construction

[0031] A magnetic resonance imaging apparatus and a magnetic resonance imaging method according to embodiments of the present invention will be described with reference to the drawings.

[0032] figure 1 It is a configuration diagram of a magnetic resonance imaging apparatus according to an embodiment of the present invention.

[0033] The magnetic resonance imaging apparatus 20 includes a cylindrical static magnetic field magnet 21 forming a static magnetic field, shim coils 22 , gradient magnetic field coils 23 , and RF coils 24 provided inside the static magnetic field magnet 21 .

[0034] In addition, the magnetic resonance imaging apparatus 20 includes a control system 25 . The control system 25 includes a static magnetic field power supply 26 , a gradient magnetic field power supply 27 , a shim coil power supply 28 , a transmitter 29 , a receiver 30 , a sequence controller 31 and a computer 32 . The gradient magnetic field power supply 27 of the control system 25 include...

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Abstract

A magnetic resonance imaging apparatus according to an embodiment includes a data acquisition unit and an image generation unit. The data collection unit collects magnetic resonance data corresponding to sampling regions that are asymmetrical in the wavenumber direction in k-space from the subject. The image generation unit generates amplitude image data in real space based on the first k-space data after zero-filling the non-sampling area of ​​the magnetic resonance data, and executes converting the amplitude image data into second k-space data and performing Magnetic resonance image data is generated by performing data processing of transforming data into real space data after filtering, or performing convolution processing of the amplitude image data using a real space function obtained by transforming the window function for filtering.

Description

technical field [0001] Embodiments of the present invention relate to a magnetic resonance imaging (MRI: Magnetic Resonance Imaging) apparatus and a magnetic resonance imaging method. Background technique [0002] MRI is an imaging method. The nuclear spins of the subject placed in a static magnetic field are magnetically excited by a Larmor frequency (RF: radiofrequency, radio frequency) signal. According to the nuclear magnetic resonance ( NMR: nuclear magnetic resonance) signal to reconstruct the image. [0003] As one of the imaging methods of MRI, AFI (Asymmetric Fourier Imaging, asymmetric Fourier Imaging) method is known. The AFI method is a method in which data is sampled so that it becomes asymmetrical in the wavenumber direction in k-space, and after phase correction is performed using the phase distribution estimated from the sampled own data, the image is The data is reconstructed. According to the AFI method, it is possible to generate image data equivalent t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055
CPCG01R33/5608A61B5/055G06T2207/10088G06T5/00G06T7/0012
Inventor 木村德典
Owner TOSHIBA MEDICAL SYST CORP