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RF coil and magnetic resonance imaging device

A technology of coils and coil elements, applied in magnetic resonance measurement, measurement device, measurement of magnetic variables, etc., can solve problems such as inability to ensure the puncture area, increase in diameter, and decrease in parallel imaging performance.

Active Publication Date: 2015-11-25
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for example, when the number of elements arranged on the side of the breast is increased for parallel imaging (Parallel Imaging) etc., since the elements of this part block a part of the area for puncture, a sufficient puncture area cannot be ensured.
On the other hand, when securing the puncture area with priority and arranging the element so as to surround the entire periphery of the puncture area, the diameter of the element has to be increased, resulting in a decrease in the performance of parallel imaging accompanied by a decrease in SNR (SignalNoiseRatio), resulting in Extension of shooting time, etc.

Method used

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  • RF coil and magnetic resonance imaging device
  • RF coil and magnetic resonance imaging device
  • RF coil and magnetic resonance imaging device

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no. 1 Embodiment approach

[0022] figure 1 It is a functional block diagram showing the configuration of the MRI (Magnetic Resonance Imaging) apparatus 100 in the first embodiment. Such as figure 1 As shown, the MRI apparatus 100 includes a static magnetic field magnet 101, a static magnetic field power supply 102, a gradient magnetic field coil 103, a gradient magnetic field power supply 104, a transmitting RF coil 105, a breast RF coil 106, a transmitting unit 107, a receiving unit 108, a bed 109, a sequence control part 120, and computer 130. In addition, the MRI apparatus 100 does not include the subject P (for example, a human body). in addition, figure 1 The shown structure is just an example. Each part may be suitably combined or configured separately.

[0023] The static field magnet 101 is a hollow cylindrical magnet, and generates a static magnetic field in the space inside the cylinder. The static field magnet 101 is, for example, a superconducting magnet or the like, and is excited by ...

no. 2 Embodiment approach

[0047] Next, a second embodiment will be described. In the first embodiment described above, it is assumed that the mesh unit 14 is detachably attached to the main body of the breast RF coil 106 and is sterilized or discarded after imaging. This is because the mesh portion 14 is usually used in direct contact with the subject P. Since the elements in the mesh portion 14 are relatively expensive, there is a disadvantage in terms of cost when it is discarded, and there is also a disadvantage that the surface material of the mesh portion 14 deteriorates when it is sterilized. Therefore, in the second embodiment, an example will be described in which a member capable of direct contact with the subject P and a member for disposing elements are separately formed. That is, in the second embodiment, the mesh part 14 can be formed separately into a part arranged on the side contacting the subject P and a part arranged on the side avoiding contact, and the lead wires of the elements ar...

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Abstract

An RF coil (106) according to an embodiment comprises a puncture needle insertion part (14) on the face of which multiple holes into which a puncture needle is inserted are formed. In the puncture needle insertion part (14), leads of multiple coil elements (14a,14b) are insulated from each other and laid in a meandering fashion in frames between the holes.

Description

technical field [0001] Embodiments of the present invention relate to RF coils and magnetic resonance imaging apparatus. Background technique [0002] Magnetic resonance imaging is to magnetically excite the nuclear spins of the subject placed in a static magnetic field by RF (Radio Frequency) pulses of its Larmor frequency, and generate images based on the data of the magnetic resonance signals generated with the excitation camera method. [0003] In this magnetic resonance imaging, a biopsy is sometimes performed. A biopsy refers to taking and examining tissue from a subject, and a puncture needle may be used for taking the tissue. For example, when collecting breast tissue, the subject is generally made to lie prone on the breast RF coil, and a puncture needle is inserted through an instrument arranged in a grid (lattice) structure closely attached to the side of the breast. For example, a block for fixing a puncture needle is installed in a rectangular hole formed by ...

Claims

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Application Information

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IPC IPC(8): A61B5/055G01R33/34
CPCG01R33/3415A61B5/055A61B90/11A61B2010/045A61B2017/3411G01R33/285A61B5/704A61B5/708G01R33/34
Inventor 太田美幸富羽贞范
Owner TOSHIBA MEDICAL SYST CORP
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