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Magnetic resonance imaging device and magnetic resonance imaging method

A magnetic resonance imaging and magnetic resonance signal technology, applied in magnetic resonance measurement, measurement using nuclear magnetic resonance image system, measurement equipment, etc., can solve the problem of image uniformity decline and other problems

Active Publication Date: 2013-06-19
TOSHIBA MEDICAL SYST CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a risk that the uniformity of the image will decrease

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, a shim coil 22 provided inside the static magnetic field magnet 21 , a gradient magnetic field coil 23 , and an RF coil 24 .

[0034] Furthermore, 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 power supply 27 of the control system 25 is composed of...

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Abstract

The magnetic resonance imaging device according to an embodiment of the present invention is equipped with a data collection unit and a data processing unit. The data collection unit collects magnetic resonance signals in accordance with imaging conditions under which a first off-resonance high frequency pulse for generating a phase shift in a magnetic resonance signal is applied after the application of the excitation pulse but before the magnetic resonance signal is read, and a second off-resonance high frequency pulse is applied to compensate for the phase shift after the magnetic resonance signal is read but before the application of the next excitation pulse. The data processing unit acquires information to be acquired by processing the data regarding the magnetic resonance signal.

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 to magnetically excite the nuclear spins of the subject placed in a static magnetic field with a Larmor frequency (RF: radio frequency) signal, and based on the magnetic resonance (MR: magnetic resonance) that occurs with the excitation A camera method that reconstructs an image from a signal. That is, in an MRI apparatus, in order to generate a nuclear magnetic resonance phenomenon, an RF pulse at a resonant frequency proportional to the strength of a static magnetic field is applied to a subject. [0003] In an MRI apparatus, slice selection excitation is often performed in order to select a slice from which MR signals are generated. Slice selection excitation is performed by applying a gradient magnetic field for slice selection (SS: slice selection). ...

Claims

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Application Information

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IPC IPC(8): A61B5/055
CPCG01R33/246G01R33/288G01R33/5605G01R33/5614G01R33/5617G01R33/5618G01R33/5673G01R33/28G01R33/54
Inventor 油井正生
Owner TOSHIBA MEDICAL SYST CORP
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