Magnet arrangement, device comprising same, and method for generating a selective

A technology for arranging structures and magnets, which is applied to the size/direction of the magnetic field, the use of permanent magnets for magnetic field measurement, and magnetic therapy, which can solve problems such as technical cost and interference

Active Publication Date: 2022-03-29
BRUKER BIOSPIN MRI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electromagnets can only ensure this when using sliding contacts, however this is technically very expensive and susceptible to interference given the required power

Method used

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  • Magnet arrangement, device comprising same, and method for generating a selective
  • Magnet arrangement, device comprising same, and method for generating a selective
  • Magnet arrangement, device comprising same, and method for generating a selective

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Embodiment Construction

[0066] figure 1A magnet arrangement is shown with a Maxwell magnet system MM comprising two axially magnetized ring magnets R1, R2. The ring magnets R1 , R2 are arranged coaxially to the axis Z and spaced apart from each other along the axis Z. To excite the magnetizable particles, a one-piece excitation coil DF is present around the sample volume PV. The excitation coil DF can also be used to detect the magnetization response that occurs in the context of the MPI measurement. The Maxwell magnet system MM generates a rotationally symmetric Maxwell gradient field comprising a gradient strength M of the point FFP of zero field in the sample volume PV.

[0067] figure 2 Also shown is a magnet arrangement comprising a Maxwell magnet system MM and an excitation coil DF for generating a point FFP of a zero field. as opposed to in figure 1 In the magnet arrangement shown in , the magnetic rings R1 and R2 of the Maxwell magnet system MM are in figure 2 Mid-radial magnetization...

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Abstract

The invention relates to a magnet arrangement, a device comprising the same and a method for generating a selective magnetic field, the magnet arrangement having: a Maxwell magnet system comprising two ring magnets which are arranged coaxially on a common Z-axis extending through a sample volume and are spaced apart from each other; a focused field coil arrangement comprising at least one focused field coil pair for moving a zero field region within the sample volume; the invention relates to a Maxwell magnet arrangement comprising a Maxwell magnet system and an excitation coil for generating an MPI excitation field, characterized in that the magnet arrangement has a quadrupole magnet system comprising at least one quadrupole ring for generating a quadrupole magnetic field, the quadrupole magnet system being arranged coaxially to the Maxwell magnet system. With the magnet arrangement according to the invention, a replacement can be made between selected magnetic fields having points of the null field and lines of the null field without undesirably increasing the field gradient.

Description

technical field [0001] The invention relates to a magnet arrangement for generating a selective magnetic field with a zero-field region and a gradient B1 in a sample volume, wherein the magnet arrangement has a Maxwell magnet system comprising two ring magnets, the ring magnets coaxially disposed on a common Z-axis extending through the sample volume and spaced apart from each other; a focusing field coil arrangement comprising at least one focusing field coil pair for moving a zero field region within the sample volume; and for generating an MPI Excitation coil for excitation field (drive field). The invention also relates to a method for generating a selective magnetic field with a field-zero region and a gradient B1 in a sample volume. Background technique [0002] Such a magnet arrangement is known from WO 2011 / 021 165 A1 [1]. [0003] The magnetic field is selected, for example, for magnetic particle imaging (MPI) methods in which the local concentration of magnetisab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/12G01R33/02A61B5/0515A61N2/00
CPCG01R33/1276G01R33/0213A61B5/0515A61N2/004A61B5/055G01R33/0017G01R33/038
Inventor J·弗兰克V·尼曼
Owner BRUKER BIOSPIN MRI
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