Nuclear magnetic resonance imaging device

A technology of nuclear magnetic resonance and imaging devices, which is applied in measuring devices, measuring magnetic variables, medical science, etc., can solve problems such as impracticality, increased burden on the subject, and difficulty in speed control, and achieve the effect of reducing the burden

Inactive Publication Date: 2009-05-27
HITACHI MEDICAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, when the movement of the general platform stops and starts, it takes a given time before the platform reaches a certain speed
Therefore speed control becomes difficult and not practical
In addition, the intermittent driving of such a platform will increase the burden on the examinee
[0010] In the case of controlling the movement speed of the platform in consideration of the blood movement time based on the location as described in the above-mentioned Patent Document 1, the same problem arises

Method used

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Embodiment Construction

[0060] Hereinafter, the embodiments of the present invention will be described with reference to the drawings.

[0061] Fig. 1 is a diagram showing the overall outline of an MRI apparatus to which the present invention is applied. This MRI apparatus has: a magnet 102 that generates a static magnetic field in a space where a subject 101 is inserted, a gradient magnetic field coil 103 that generates a gradient magnetic field in the space, and an RF coil that generates a high-frequency magnetic field in the imaging area of ​​the subject 104. An RF probe 105 that detects a nuclear magnetic resonance (MR) signal generated by the subject 101, and a platform 112 for inserting the subject 101 in the static magnetic field space. The desktop of the platform 112 is provided with a detection mechanism, such as an encoder, for detecting its position and movement amount.

[0062] The gradient magnetic field coils 103 are composed of gradient magnetic field coils in three directions (X, Y, Z) pe...

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Abstract

There is provided an MRI device capable of turning on / off imaging by a biometric synchronous signal and modifying the imaging condition when performing moving-bed imaging and reducing a load on an examinee attributed to fluctuation of bed movement speed. Control means controls the bed conveying an examinee in a static magnetic field and means for applying an RF magnetic field and inclination magnetic field for imaging. The control means sets the bed movement speed at a constant speed considering the whole imaging time and controls the magnetic field application means of the RF magnetic field and the inclination magnetic field in such a manner that the movement speed of the imaging field-of-view (imaging area) in the examinee coordinate is different from the bed movement speed.

Description

Technical field [0001] The present invention relates to a nuclear magnetic resonance imaging device (hereinafter referred to as an MRI device) that measures NMR signals from hydrogen or phosphorus in a subject, and visualizes the density distribution or relaxation time distribution of nuclei, etc., in particular to a This is an MRI device that uses an imaging method (called a mobile platform imaging method) that captures NMR data while continuously moving the platform on which the subject is placed, and captures a wide range of parts in the body axis direction. The method of artifacts caused by the body. Background technique [0002] As one of the methods for observing the blood flow dynamics and metabolism of the whole body using an MRI apparatus, a method of continuously moving the platform and performing imaging (moving platform imaging method) has been proposed (Patent Document 1, etc.). [0003] In addition, a method of recovering the deterioration of the image quality accom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055
CPCG01R33/5635G01R33/4833G01R33/56375G01R33/5676A61B5/055A61B5/7285G01R33/56383G01R33/5673
Inventor 高桥哲彦后藤智宏
Owner HITACHI MEDICAL CORP
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