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Multi-channel TEM coils with auxiliary decoupling elements

A multi-channel and component technology, applied in the field of magnetic resonance imaging and spectrum analysis, can solve the unsatisfactory problems of multi-channel TEM coils, the complexity of TEM coils, difficult adjustment and decoupling, etc.

Inactive Publication Date: 2010-12-01
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Likewise, capacitive networks introduce undesired complexity into the TEM coil and are difficult to tune for decoupling
[0009] Therefore, there remains an unmet need in the prior art for improved multi-channel TEM coils and for improved methods for decoupling TEM elements

Method used

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  • Multi-channel TEM coils with auxiliary decoupling elements
  • Multi-channel TEM coils with auxiliary decoupling elements
  • Multi-channel TEM coils with auxiliary decoupling elements

Examples

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Embodiment Construction

[0029] refer to figure 1 , the magnetic resonance scanner 10 includes static (B 0 ) main magnet 12 of the magnetic field in which an object 16 is placed (in figure 1 shown in phantom). The illustrated magnetic resonance scanner 10 is a horizontal cavity type scanner, shown in section to expose selected components; however, other types of magnetic resonance scanners may also be used. The magnetic resonance scanner 10 is optionally a high-field scanner in which the main magnet 12 produces a static (B 0 ) magnetic field having a magnetic field strength greater than or about 3 Tesla, and in some embodiments greater than or about 5 Tesla. In some embodiments, the main magnet 12 produces a static (B 0 )magnetic field. Higher or lower magnetic field strengths are also contemplated.

[0030] The magnetic resonance scanner 10 also includes a magnetic field gradient system 18 that superimposes selected magnetic field gradients onto the static (B 0 ) magnetic field to perform vari...

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Abstract

A radio frequency coil (30) includes a radio frequency screen (34), a plurality of operative TEM elements (35) defined by parallel elongate conductive elements (36) coupled with the radio frequency screen and configured for operative connection with a multi-channel radio frequency driver (32), and a plurality of auxiliary elongate conductive elements (40, 50, 60, 70, 80a, 80b). Each auxiliary elongate conductive element is arranged parallel with and between two neighboring operative TEM elements and tuned to substantially decouple the two neighboring operative TEM elements, there being an auxiliary elongate conductive element disposed between each two neighboring operative TEM elements.

Description

technical field [0001] The invention relates to the field of magnetic resonance. The invention has illustrative application to, and is described with particular reference to, magnetic resonance imaging and spectroscopy. However, the invention can also be applied to other magnetic resonance and radio frequency applications. Background technique [0002] Magnetic resonance frequency and free-space wavelength depend on static (B 0 ) magnetic field (also known as the main magnetic field), in particular, the free-space wavelength decreases as the magnetic field increases. At high magnetic fields (e.g., about 3 Tesla or higher), relatively short free-space wavelengths can introduce large spatial inhomogeneities in radio frequency excitations that can be driven by conventional orthogonal drive volumes such as birdcages or TEM coils. coil provided. [0003] Therefore, as the magnetic resonance industry has moved to higher magnetic fields, such as magnetic resonance scanners oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/34G01R33/36
CPCG01R33/365G01R33/3453
Inventor K-M·吕德克
Owner KONINK PHILIPS ELECTRONICS NV
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