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Magnetic resonance imaging device, diagnostic bed device and rf coil device

A magnetic resonance imaging and coil device technology, which is applied in the direction of measuring devices, diagnosis, and measuring magnetic variables, etc., can solve the problems of reducing dynamic range, increasing wireless output, and increasing electromagnetic waves for wireless communication.

Active Publication Date: 2016-06-01
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] More specifically, in the MRI apparatus, in order to suppress the influence on the receiving sensitivity of weak MR signals radiated from the subject, it is not possible to increase the output of electromagnetic waves used for wireless communication between the RF coil apparatus and the MRI apparatus.
Without being able to increase the wireless output, the dynamic range is reduced due to the signal loss when the transmitted signal spreads in space

Method used

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  • Magnetic resonance imaging device, diagnostic bed device and rf coil device
  • Magnetic resonance imaging device, diagnostic bed device and rf coil device
  • Magnetic resonance imaging device, diagnostic bed device and rf coil device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach 〉

[0060] figure 1 It is a block diagram showing the overall configuration of the MRI apparatus 20A in the first embodiment. Such as figure 1 As shown, the MRI apparatus 20A has a gantry 21 , a bed apparatus 30 , and a control apparatus 40 .

[0061] The MRI apparatus 20A includes, for example, a static field magnet 22 , a shim coil 24 , a gradient magnetic field coil 26 , and a transmission RF coil 28 in a cylindrical gantry 21 . The stand 21 corresponds to the part indicated by the bold line in the figure.

[0062] The bed apparatus 30 has a support base 31 , a top drive device 32 and a top plate 34 arranged inside the support base 31 . The bed apparatus 30 is, as an example here, of a movable dockable type and has a connection portion not shown. The bed apparatus 30 is connected to the gantry 21 via the connection portion, and receives a control signal from the control device 40 via the connection portion. The support stand 31 supports the top plate 34 so as to be movable...

no. 2 approach 〉

[0203] Next, an MRI apparatus 20A of the second embodiment will be described. In addition, the MRI apparatus 20A of the second to fifth embodiments differs from the first embodiment only in the fixing mechanism for fixing the coil-side wireless communication device, so only the difference will be described.

[0204] Figure 8 It is a schematic perspective view showing a fixing mechanism 500B that fixes the coil-side wireless communication device 200B in the MRI apparatus 20A of the second embodiment. Such as Figure 8As shown, the coil-side wireless communication device 200B has a frame body 202b, for example, in the shape of a cuboid, and protrusions 240b are respectively fixed at four corners of the bottom surface. Regarding this fixing method, for example, adhesion may be used, or integral formation with the frame body 202b may be possible. Each protrusion 240b is formed, for example, into a cylindrical shape from a non-magnetic material that does not deform.

[0205] I...

no. 3 approach 〉

[0211] Next, an MRI apparatus according to a third embodiment will be described.

[0212] Figure 10 It is a cross-sectional schematic diagram of the fixing mechanism 500C in a state where the coil-side wireless communication device 200C is not fixed in the MRI apparatus 20A of the third embodiment.

[0213] Figure 11 It is a cross-sectional schematic diagram of the fixing mechanism 500C in a state where the coil-side wireless communication device 200C is fixed in the MRI apparatus 20A of the third embodiment.

[0214] through from Figure 10 The state of the coil side wireless communication device 200C slides and moves toward the back side of the fixing mechanism 500C on the upper surface of the top plate 34, and becomes Figure 11 the fixed state.

[0215] Such as Figure 11 As shown, in the coil side wireless communication device 200C, the side surface of the casing 202c opposite to the exposed surface of the cable 102 is obliquely chamfered toward the upper side (the...

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Abstract

In an embodiment, the MRI apparatus (20A, 20B) comprises a first wireless communication unit (200A-200E), a second wireless communication unit (300), an image reconstruction unit (56), and a tabletop (34). The first wireless communication unit acquires a nuclear magnetic resonance signal detected by the RF coil device (100) and wirelessly transmits a digitalized nuclear magnetic resonance signal via an induction field. A second wireless communication unit receives the nuclear magnetic resonance signal transmitted wirelessly from the first wireless communication unit via the induction field. The image reconstruction unit reconstructs subject image data on the basis of the nuclear magnetic resonance signal received by the second wireless communication unit. The tabletop is provided with supports (500A-500E) for fixing the first wireless communication unit to a second wireless communication unit so as to be freely detachable.

Description

technical field [0001] Embodiments of the present invention relate to a magnetic resonance imaging apparatus, a bed apparatus, and an RF coil apparatus. Background technique [0002] MRI is an imaging method in which nuclear spins of a subject placed in a static magnetic field are magnetically excited by an RF pulse of a Larmor frequency, and an image is reconstructed from an MR signal accompanying the excitation. In addition, the above-mentioned MRI refers to magnetic resonance imaging (Magnetic Resonance Imaging), RF pulse refers to radio frequency pulse (radiofrequency pulse), and MR signal refers to nuclear magnetic resonance signal (nuclear magnetic resonance signal). [0003] Here, for example, an RF coil device (Radio Frequency Coil Device) is used to transmit an RF pulse for the spin of atomic nuclei in the subject by passing an RF pulse current through the coil and to detect the generated MR signal. Some of the RF coil devices are built in the MRI device itself, bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055
CPCG01R33/3692A61B5/055G01R33/34007G01R33/3415
Inventor 富羽贞范本桥弘树石井学
Owner TOSHIBA MEDICAL SYST CORP