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Magnetic resonance tomographic device and method for testing

A technology of magnetic resonance tomography and imaging equipment, which is applied in the direction of measurement, magnetic resonance measurement, and diagnosis using a nuclear magnetic resonance imaging system, and can solve the problems of increased image acquisition time overhead and reduced image quality.

Pending Publication Date: 2021-05-11
SIEMENS HEALTHCARE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Even small deteriorations, such as they can insidiously occur due to increased contact resistance at plug connections or due to degradation of components, lead to reduced image quality and increased time expenditure during image acquisition

Method used

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  • Magnetic resonance tomographic device and method for testing
  • Magnetic resonance tomographic device and method for testing
  • Magnetic resonance tomographic device and method for testing

Examples

Experimental program
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Embodiment Construction

[0046] figure 1 A schematic diagram of an embodiment of a magnetic resonance tomography system 1 according to the invention is shown.

[0047] The magnet unit 10 has a field magnet 11 that generates a static magnetic field B0 in the recording region for aligning nuclear spins of a sample or patient 100 . The recording area is characterized by an extremely homogeneous static magnetic field B0, wherein homogeneity especially relates to the magnetic field strength or absolute value. The recording area is almost spherical and is arranged in a patient tunnel 16 which extends through the magnet unit 10 in the longitudinal direction 2 . The patient couch 30 is movable in the patient tunnel 16 by a mobile unit 36 ​​. Field magnets 11 are usually superconducting magnets that can provide magnetic fields with flux densities up to 3T, in the case of the latest devices even higher. For lower field strengths, however, permanent magnets or electromagnets with normally conducting coils can...

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Abstract

A magnetic resonance tomography scanner and a method for testing the magnetic resonance tomography scanner are provided. The magnetic resonance tomography scanner has a transmitter that is configured to transmit two-tone signals at different levels and to acquire inter-modulation products of the two-tone signal with the receiver. A status of a receive path is inferred via a behavior of odd-order inter-modulation products.

Description

technical field [0001] The invention relates to a magnetic resonance tomography system and to a method for operating the magnetic resonance tomography system, by means of which the proper functioning of the reception path can be checked. Background technique [0002] A magnetic resonance tomography apparatus is an imaging device that uses an external strong magnetic field to align nuclear spins of an inspection object and excites the nuclear spins to precess around the alignment by an alternating magnetic field in order to image an inspection object. The precession or return of the spins from this excited state to a state with less energy in response in turn generates an alternating magnetic field which is received via the antenna. [0003] A position encoding is applied to these signals by means of gradient magnetic fields, which then enables the received signals to be associated with volume elements. The received signals are then analyzed and a three-dimensional imaging r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/36G01R33/48G01R33/00
CPCG01R33/36G01R33/3607G01R33/48G01R33/0023G01R33/3664G01R33/34038G01R33/3621G01R33/3692A61B5/055
Inventor S.比伯
Owner SIEMENS HEALTHCARE GMBH