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Magnetic resonance image forming equipment

A technology of magnetic resonance imaging and equipment, which is applied in the fields of magnetic resonance measurement, measurement using nuclear magnetic resonance image system, material analysis through resonance, etc., which can solve the problems of stable state being disturbed and not suitable for imaging, etc.

Inactive Publication Date: 2004-05-19
GE MEDICAL SYST GLOBAL TECH CO LLC
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  • Abstract
  • Description
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Problems solved by technology

[0011] Grease suppression by the aforementioned grease suppression pulse is not suitable for imaging in the SSFP state due to the perturbed steady state

Method used

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  • Magnetic resonance image forming equipment
  • Magnetic resonance image forming equipment
  • Magnetic resonance image forming equipment

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Embodiment Construction

[0048] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. figure 1 A block diagram of a magnetic resonance imaging apparatus as an embodiment of the present invention is shown. The configuration of the device represents an embodiment of the device according to the invention.

[0049] Such as figure 1 As shown, the device has a magnet system 100 . The magnet system 100 has a main field coil section 102 , a gradient coil section 106 , and a radio frequency coil section 108 . These coil portions have a generally cylindrical shape and are arranged concentrically. The object 1 to be imaged is supported on the holder 500, and is loaded into and out of the generally cylindrical-shaped inner space (hole) of the magnet system 100 by a carrier device (not shown).

[0050] The main field coil section 102 generates a static magnetic field in the inner space of the magnet system 100 . The direction of the static magnet...

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Abstract

For the purpose of providing a magnetic resonance imaging apparatus for capturing water / fat-separated images free of banding artifacts in an SSFP state, an apparatus comprises: acquiring means (202) for acquiring echo data of a plurality of views in which a phase difference between water and fat is 2pi / m (m>=2) with spins within a subject brought to the SSFP state and repeating the acquisition for k=0 through M-1 with a step difference in a phase of an RF pulse of 2pi.k / M; transforming means (204) for conducting Fourier transformation on the echo data based on the phase step difference; separating means (206) for separating water data and fat data respectively in F(0) term and F(1) term of the Fourier-transformed data using the phase difference between water and fat; adding means (208') for obtaining a sum of absolute values of at least the water data or fat data in the F(0) term and F(1) term; and image producing means (210') for producing an image based on the sum data.

Description

technical field [0001] The present invention relates to a magnetic resonance imaging apparatus, in particular to an apparatus for performing magnetic resonance imaging with spins in a subject in a steady state free precession (SSFP) state. Background technique [0002] One conventional technique for performing magnetic resonance imaging is the method of performing magnetic resonance imaging with spins in the subject in the SSFP state. The method is based on the sum or difference of echo data obtained from radio frequency (RF) pulses with a constant phase and echo data obtained from RF pulses with a phase varying between 0 and π to generate an image (for example, see Patent Document 1). [0003] Conventional techniques for suppressing fat signals in magnetic resonance imaging include methods using fat suppression pulses (for example, see Non-Patent Document 1) and methods using fluctuation-balanced magnetic resonance (FEMR) (for example, see Non-Patent Document 1). Document...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055G01R33/48G01R33/54G01R33/561
CPCG01R33/5613G01R33/4828A61B5/055
Inventor 三好光晴小杉进
Owner GE MEDICAL SYST GLOBAL TECH CO LLC
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