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Local coil with detuning function

A technology of local coils and coil components, which is applied in the fields of magnetic resonance measurement, medical science, and measurement devices, and can solve problems such as influence and unfavorable flexibility of local coils

Pending Publication Date: 2021-10-01
SIEMENS HEALTHCARE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the housing also adversely affects the flexibility of the local coil

Method used

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  • Local coil with detuning function
  • Local coil with detuning function
  • Local coil with detuning function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] figure 1 A magnetic resonance system 10 is shown schematically. The magnetic resonance system 10 includes a magnet unit 11 having a main magnet 12 for generating a strong and in particular temporally constant main magnetic field 13 . Furthermore, the magnetic resonance system 10 includes a patient receiving area 14 for receiving a patient 15 . In this exemplary embodiment, the patient receiving area 14 is cylindrical and is surrounded cylindrically by the magnet unit 11 in the circumferential direction. In principle, however, a different embodiment of the patient receiving area 14 is also conceivable at any time. The patient 15 can be pushed into the patient receiving area 14 by means of the patient support device 16 of the magnetic resonance system 10 . For this purpose, the patient support device 16 has a patient couch 17 which is designed to be movable in the patient receiving area 14 .

[0052] Furthermore, the magnet unit 11 has a gradient coil unit 18 for gene...

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Abstract

The present invention relates to a local coil and a magnetic resonance apparatus. The local coil includes a coil element in the form of a loop. The at least one coil element includes a first conductor, a second conductor, and a third conductor. The at least one coil element also includes a first dielectric and a second dielectric. The first dielectric is arranged between the first conductor and the second conductor, and the second dielectric is arranged between the second conductor and the third conductor. The coil element includes a receive unit that includes the first conductor and the second conductor, and a detuning unit that includes the third conductor. In a first operating state of the coil element, the receive unit has a first resonant frequency. In a second operating state of the coil element, the detuning unit is configured to detune the resonant frequency of the receive unit so that the receive unit has a second resonant frequency different than the first resonant frequency.

Description

technical field [0001] The invention relates to a local coil and a magnetic resonance system. Background technique [0002] A magnetic resonance imaging system is an imaging system which, for imaging an examination subject, aligns the nuclear spins of the examination subject with a strong external magnetic field and excites the nuclear spins to precess around this alignment by means of an alternating magnetic field. The precession or return of the spins from this excited state to a state with lower energy in turn generates an alternating magnetic field (also referred to as a magnetic resonance signal) in response, which is received by the antenna. [0003] To excite the precession of the spins, a high-frequency (HF) alternating magnetic field is required, which has a frequency corresponding to the Larmor frequency at the corresponding static magnetic field strength, and which requires very high field strengths. In order to improve the signal-to-noise ratio of the magnetic r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/36G01R33/341A61B5/055
CPCG01R33/36G01R33/341A61B5/055G01R33/34084G01R33/34007G01R33/3657G01R33/3415G01R33/365
Inventor R.雷纳H.格雷姆
Owner SIEMENS HEALTHCARE GMBH