Magnetic resonance imaging with rf noise detection coils

A technology for magnetic resonance imaging and noise detection, which is applied in magnetic resonance measurement, measurement of magnetic variables, measurement devices, etc., and can solve problems such as expensive and massive metal construction.

Active Publication Date: 2016-11-23
KONINKLIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of using such an RF cage is that it uses a lot of metal (such as copper) and is expensive to build

Method used

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  • Magnetic resonance imaging with rf noise detection coils
  • Magnetic resonance imaging with rf noise detection coils
  • Magnetic resonance imaging with rf noise detection coils

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Embodiment Construction

[0122] Like numbered elements in these figures are either equivalent elements or perform the same function. Elements that have been discussed previously will not necessarily be discussed in later figures if the function is equivalent.

[0123] figure 1 An example of a magnetic resonance imaging system 100 is shown. The magnetic resonance imaging system 100 includes a magnet 104 . The magnet 104 is a superconducting cylindrical magnet 104 having a bore 106 therethrough. The use of different types of magnets is also possible, eg the use of both split cylindrical magnets and so-called open magnets is also possible. Split cylindrical magnets are similar to standard cylindrical magnets, except that the cryostat has been divided into two sections to allow access to the isoplane of the magnet, such magnets may be used, for example, in conjunction with charged particle beam therapy. An open magnet has two magnet sections, one above the other, with a space between them large enough...

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Abstract

The invention provides for a magnetic resonance imaging system (100) for acquiring magnetic resonance data (142, 144) from an imaging zone (108). Execution of the instructions causes a processor (133) controlling the MRI system to: acquire (200) imaging magnetic resonance data (142) with radio frequency excitation of the radio frequency system enabled; acquire (202) noise radio frequency data (148) using at least one RF noise detection coil, wherein the noise radio frequency data is acquired simultaneously with the imaging magnetic resonance data; acquire (204) calibration magnetic resonance data (144) with radio frequency excitation of the radio frequency system disabled; acquire (206) reference radio frequency data (146) using the at least one RF noise detection coil, wherein the reference radio frequency data is acquired simultaneously with the calibration magnetic resonance data; and calculate (208) a noise calibration (150) using the reference radio frequency data and the calibration magnetic resonance data.

Description

technical field [0001] The present invention relates to magnetic resonance imaging, in particular to magnetic resonance imaging in the presence of spurious RF signals. Background technique [0002] Large static magnetic fields are used by Magnetic Resonance Imaging (MRI) scanners to align the nuclear spins of atoms as part of the procedure used to generate images inside a patient's body. This large static magnetic field is called the B0 field or main magnetic field. [0003] During an MRI scan, radio frequency (RF) pulses generated by a transmitter coil cause perturbations to the local magnetic field, and RF signals emitted by nuclear spins are detected by a receiver coil. These RF signals are used to construct MRI images. These coils can also be referred to as antennas. Additionally, the transmitter and receiver coils can also be integrated into a single transceiver coil that performs both functions. It should be understood that use of the term transceiver coil also ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/422
CPCG01R33/422G01R33/36G01R33/5659G01R33/3607G01R33/583
Inventor P·R·哈维M·J·杜伊维斯蒂恩S·洛伦茨
Owner KONINKLIJKE PHILIPS NV
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