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Magnetic resonance inspecting apparatus

一种检查装置、磁共振的技术，应用在RF接收线圈领域，能够解决通道数增加等问题

Inactive Publication Date: 2009-11-04
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, when used in a full-body setup, it may result in an increase in the number of channels

Method used

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  • Magnetic resonance inspecting apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0097] First refer to figure 1 A general configuration of the MRI apparatus according to this embodiment will be described. figure 1 It is an explanatory diagram showing a general configuration of an MRI apparatus.

[0098] figure 1 Among them, the MRI apparatus related to this embodiment includes: an MRI apparatus body 50, which has a pair of magnets 101 arranged up and down to generate a static magnetic field in a vertical direction z indicated by an arrow z; The person (inspection object 103) is inserted into the static magnetic field in the vertical direction z of the MRI apparatus main body 50; a power supply unit not shown, a computer for processing images, and the like.

[0099] The MRI apparatus body 50 includes: an upper body 51 with a built-in magnet 101 , a lower body 52 , and a pillar portion 53 connecting and supporting the upper body 51 to the upper portion of the lower body 52 . A space of a predetermined size for inserting the test object 103 is formed betwe...

Embodiment

[0185] first, Figure 27 The layout diagram of the sub-coil after simulation and the G factor at this time are shown. Figure 27 (A) is an arrangement diagram of sub-coils in the y-z plane viewed from the x-axis direction, Figure 27 (B) is an arrangement diagram of sub-coils on the x-y plane viewed from the z-axis direction. Sub-coil 3-1 and 4-1 with Figure 4 The sub-coils of the same number are the same in the shown receiving coils. The sub-coils 6-1-1 and 6-1-2 are the most suitable deformation and appropriate overlapping of the conventional large-view coil (here, the saddle coil) 6-1, and the sub-coils 7-1-1 , 7-1-2 are set after the sub-coils 7-1 having sensitivity distribution in the left and right directions (hereinafter referred to as the RL direction, here the x direction) are deformed most appropriately and overlapped appropriately. And, the sub-coils 5-1-1 and 5-1-2 are moderately overlapping 2 sub-coils 5-1, and as Figure 12 As shown in (B), the two intersec...

no. 2 Embodiment approach

[0198] Refer below Figure 30 The external configuration of the receiving coil unit 103 according to the second embodiment will be described. Figure 30 Regarding the second embodiment, (A) is a perspective view of a state in which an inspection object is set, (B) is a cross-sectional view in a plane perpendicular to the body axis, and (C) is a perspective view of a state in which an outer support is opened. , (D) is an external view of the state after the inner support is opened.

[0199] In the figure, in this embodiment, the support supporting the coil conductor has a double structure consisting of an outer support 20-2 and an inner support 20-1. The outer support 20 - 2 can be divided into the back side and the chest side of the subject as shown in (C), and can be opened from one side of the test subject 103 . The inner support body 20 - 1 can be opened to both sides from the upper side (the ventral side when the person is supine) of the test subject 103 as shown in (D)....

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Abstract

Provided is a vertical magnetic type MRI apparatus, which can image an arbitrary section of a wide range such as the whole body of a specimen at a high speed in a high sensitivity of even a deep portion of the specimen while suppressing the increase in a channel number. A receiving coil unit (500) is constituted to comprise a bed coil unit (600) having its longitudinal direction aligned with the body axis direction of an inspection object (103), and an upper coil unit (700) mounted removably on the bed coil unit (600). This bed coil unit (600) includes a placing face (601) for placing the inspection object (103), and a plurality of lower sub-coils arranged below the placing face (601). The upper coil unit (700) includes a plurality of upper sub-coils connected with the lower sub-coils. The upper sub-coils are arranged separately on an inner support (20-1) having a flexibility for covering the placing face (601) and an outer support (20-2) having a flexibility for covering the outer side of the inner support (20-1). The upper sub-coils and the lower sub-coils are connected by attaching the upper coil unit (700) to the bed coil unit (600), so that a plurality of kinds of sub-coils can be formed.

Description

technical field [0001] The present invention relates to a magnetic resonance inspection device (MRI device), in particular to a vertical magnetic field type MRI device and its applicable RF receiving coil for nuclear magnetic resonance signal detection. Background technique [0002] MRI is a device that sets the inspection object in a uniform static magnetic field space and uses nuclear magnetic resonance to image the inspection object. The shooting range is limited to the static magnetic field space. In recent years, a method of photographing a whole body by moving a table (bed) on which an examination object is placed has been developed, and attempts of full-body screening using MRI have attracted attention in particular. [0003] When measuring a large area such as the whole body, it is desirable to shorten the imaging time in order to realize a receiving coil that can maintain high sensitivity in the large area, and to control the measurement time within a time that the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055G01R33/34
CPCG01R33/3415A61B5/055G01R33/34084G01R33/34007A61B5/704
Inventor 二乃宫笃笠井嘉越智久晃土畑正良宫元嘉之永井静
Owner HITACHI LTD
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