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Radio frequency coil unit and magnetic resonance imaging device

A technology of high-frequency coils and high-frequency signals, which can be used in measuring devices, measuring magnetic variables, medical science, etc., and can solve problems such as image quality degradation of circuit components

Active Publication Date: 2014-05-14
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This unbalanced current causes damage to circuit elements in the RF signal transmission and reception system or causes deterioration of image quality.

Method used

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  • Radio frequency coil unit and magnetic resonance imaging device
  • Radio frequency coil unit and magnetic resonance imaging device
  • Radio frequency coil unit and magnetic resonance imaging device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ）

[0024] figure 1 It is a configuration diagram of the RF coil unit and the magnetic resonance imaging apparatus according to the first embodiment of the present invention.

[0025] The magnetic resonance imaging apparatus 1 is configured by providing an RF coil unit 2 to an imaging system 3 . The imaging system 3 is a system that performs MR imaging of the subject O using the RF coil unit 2 . Therefore, the imaging system 3 is provided with a gantry 7 coaxially incorporating a static magnetic field magnet 4 , a gradient magnetic field coil 5 , and a whole body coil (WBC: whole body coil) 6 for RF signal transmission, and an MR signal receiving The RF coil 8, the bed 9 and the control system 10 are used.

[0026] The RF coil unit 2 can be used as one or both of the RF coil for RF signal transmission and the RF coil 8 for MR signal reception. Therefore, the WBC6 can also be used as the RF coil unit 2 . In addition, the RF coil unit 2 may be connected to the imaging system 3 a...

no. 2 approach ）

[0070] Figure 6 is a configuration diagram of an RF coil unit according to a second embodiment of the present invention, Figure 7 to show yes Figure 6 A diagram of a state in which a switch of the switching circuit shown is switched.

[0071] Figure 6 The RF coil unit 50 of the second embodiment shown is different from the RF coil unit 2 of the first embodiment in that a switch circuit 51 is provided, and the switch circuit 51 changes the route through which a part of the plurality of cables 40 passes. The number of cables 40 of at least one balun circuit 41 or other at least one balun circuit 41 . The other configurations and functions of the RF coil unit 50 of the second embodiment are substantially the same as those of the RF coil unit 2 of the first embodiment, so the same symbols are assigned to the same configurations, and description thereof will be omitted.

[0072] exist Figure 6 In the example shown, in the RF coil unit 50, the three balun circuits of the f...

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PUM

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Abstract

A radio frequency coil unit according to an embodiment includes a plurality of cables, a plurality of radio frequency coil elements, and a plurality of balun circuits. The plurality of cables corresponds to a plurality of channels. The plurality of radio frequency coil elements is connected to the plurality of cables directly or indirectly. The plurality of balun circuits is configured so that at least one has some of the plurality of cables passing therethrough, without touching the same or while touching the same, so as to suppress the effects of unbalanced current flowing in some of the plurality of radio frequency coil elements.

Description

technical field [0001] Embodiments of the present invention relate to a radio frequency (RF: radio frequency) coil unit and a magnetic resonance imaging (MRI: Magnetic Resonance Imaging) apparatus. Background technique [0002] The MRI device uses Larmor (Larmor) frequency RF signals to magnetically excite the nuclear spins of the subject placed in a static magnetic field, and according to the magnetic resonance (MR:magnetic resonance) signals generated with the excitation An image diagnostic device for reconstructing images. [0003] An unbalanced current received from a transmitting RF coil or a peripheral electric circuit flows through the cable of the RF coil used in the MRI apparatus. This unbalanced current causes breakage of circuit elements in the RF signal transmission and reception system or deterioration of image quality. In an MRI apparatus, a plurality of RF coils are generally used, and therefore unbalanced currents are generated in respective cables connecte...

Claims

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Application Information

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IPC IPC(8): A61B5/055
CPCG01R33/3685A61B5/055
Inventor 石原隆寻富羽贞范
Owner TOSHIBA MEDICAL SYST CORP