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RF coil and magnetic resonance imaging apparatus

A technology of coils and elements, applied in the field of MRI equipment, can solve problems such as unevenness

Active Publication Date: 2011-11-16
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the decoupling method proposed in the aforementioned U.S. Patent No. 4,825,162 specification, it is necessary to overlap two elements in the arrangement plane in the divided / connected part of the case.
Therefore, for example, there is an unsolved problem that the shape of the housing of the overlapped part must be designed to be thin; and it cannot be divided on a surface perpendicular to the alignment direction of the components according to the need for overlapping, and the housing's The unresolved issue that the divided / connected parts become uneven

Method used

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  • RF coil and magnetic resonance imaging apparatus
  • RF coil and magnetic resonance imaging apparatus
  • RF coil and magnetic resonance imaging apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 It is a system configuration diagram of the MRI apparatus according to Embodiment 1 of the present invention. The MRI apparatus 100 has a static field magnet 11 , a gradient magnetic field coil 13 , a gradient magnetic field power supply 15 , a high frequency coil 17 , a transmitter 19 , a helmet-shaped head coil device 21 , and a receiver 25 .

[0033] The cylindrical static field magnet 11 generates the same static field in the internal space. For the static field magnet 11, for example, a permanent magnet, a superconducting magnet, or the like is used. A cylindrical gradient coil 13 is disposed inside the static field magnet 11 . The gradient magnetic field coil 13 is configured by combining three coils corresponding to X, Y, and Z axes that are perpendicular to each other. The three coils each receive a current supply from the gradient magnetic field power supply 15, and generate a gradient magnetic field whose magnetic field intensity is inclined along ...

Embodiment 2

[0059] Figure 8 It is a side view for explaining the shape of the division|segmentation / connection part of the coil device of Example 2 of this invention. exist Figure 8 Among them, the first element 3 is composed of one circuit pattern forming a ring, and its configuration includes: a main ring part 3a formed as two parallel patterns, and a slave main ring part 3a on the side of the second element 4 of the main ring part 3a. The ring portion 3a is a sub-ring portion 3c (first counter electromotive force sensing portion) formed so as to be bent. The sub-ring portion 3c is formed in a substantially arc-shaped pattern connecting both ends to the two patterns of the main ring portion 3a.

[0060] The second element 4 is formed with one circuit pattern forming a ring, and its configuration includes: a main ring portion 4a formed as two parallel patterns; an intersection portion 4b formed on the first element 4 side of the main ring portion 4a. ; The sub-ring portion 4c (secon...

Embodiment 3

[0064] Figure 9It is a side view for explaining the shape of the division|segmentation / connection part of the coil device of Example 3 of this invention. exist Figure 9 Among them, the first element 5 is formed with one circuit pattern forming a ring, and its composition includes: a main ring portion 5a formed in two parallel patterns; The winding portion 5b (first counter electromotive force induction portion) formed by winding a cylindrical coil shape a plurality of times.

[0065] The winding portion 5b is formed from one side ( Figure 9 The pattern that one end of the main ring portion 5a on the front side) is folded back toward the central side extends beyond the central portion to the opposite side, then folds back as it is perpendicular to the arrangement plane, and the rear side faces the second element 6 to the left It is spirally wound a predetermined number of times while extending in the direction of the second element 6, and then returns to the arrangement p...

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Abstract

The invention provides a radio-frequency (RF) coil and a magnetic resonance imaging (MRI) apparatus. In a radio-frequency (RF) coil, a plurality of coil elements, each of which receives a magnetic resonance signal from a subject, are arranged in each of a first unit and a second unit, where the two units can be joined with or separated from each other, wherein at least a first coil element, which is one coil element among the coil elements in the first unit, has a first main loop and a first sub-loop connected with the first main loop in series, at least a second coil element, which is one coil element among the coil elements in the second unit, has a second main loop, and a second sub-loop connected with the second main loop in series and facing the first sub-loop at a portion capable of joining / separating and being oppositely-orientated with respect to a winding direction of the first sub-loop, and a retaining unit is provided that retains a positional relationship where the first sub-loop and the second sub-loop are mutually faced.

Description

[0001] This application is a divisional application of the invention patent application with the application number 200810083099.0, the application date is March 21, 2008, and the invention name is "RF coil and MRI device". [0002] (related application) [0003] This application enjoys the priority of the Japanese patent application No. 2007-74794 filed on March 22, 2007 and the Japanese patent application No. 2008-009068 filed on January 18, 2008, and the Japanese patent application The entire contents are referred to in the present invention. technical field [0004] The present invention relates to an MRI (Magnetic Resonance Imaging: Magnetic Resonance Imaging) apparatus, and a high-frequency coil apparatus (RF coil) connected to the MRI apparatus to receive magnetic resonance signals generated from a subject, and particularly relates to arranging a plurality of Decoupling of high-frequency coil devices composed of elements (element coils). Background technique [0005...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/3415G01R33/36
Inventor 石原隆寻冈本和也光井信二
Owner TOSHIBA MEDICAL SYST CORP