Magnetic resonance radio frequency coil and magnetic resonance imaging system
A magnetic resonance imaging and radio frequency coil technology, which is applied in magnetic resonance measurement, material analysis through resonance, magnetic property measurement, etc., can solve the problems of poor imaging effect, uneven magnetic field, uneven current distribution, etc., and achieve clear magnetic resonance The effect of imaging
Active Publication Date: 2013-10-09
SHENZHEN RF TECH
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Problems solved by technology
A structure of radio frequency transmitting coils, which is a multi-group paired three-dimensional annular strip structure, each group of strip structures is connected by a capacitor, when it is close to the magnet or the operating frequency increases, each strip in the multi-group arrangement of coils As the unit coil, the current in each unit is different due to the different influence of the magnetic field coupling of other units. The uneven current distribution in this unit leads to the uneven magnetic field generated, and the final sample image There will be obvious changes in light and shade, and in some special applications, the imaging effect will be poor
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[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] Such as figure 1 Shown is a schematic diagram of a three-dimensional circuit structure of a magnetic resonance radio frequency coil according to an embodiment of the present invention. The radio frequency coil 100 includes an upper half 200 and a lower half 300 . A Cartesian coordinate system is established in the magnetic resonance imaging system, and the direction of the static magnetic field is set along the Z axis. Assuming that the lower part 300 of the radio frequency coil is distributed on the plane Z=0, the upper part 200 of the radio frequency coil is distributed on the plane Z=L, where L is a constant, representing the spacing of the inner space of the radio frequency coil in the Z direction. The upper half 200 and the lower half 300 of the radio frequency coil are similar in structure and parallel to each other, and...
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The invention relates to a magnetic resonance radio frequency coil which is resonant in the resonant frequency f0 and comprises an upper half portion and a lower half portion which are parallel to each other. The upper half portion comprises more than three unit coils which are parallel and arranged at intervals, the lower half portion comprises more than three unit coils which are parallel and arranged at intervals, and adjacent unit coils are coupled through a capacitor or an inductor. No less than one capacitor is connected in series in a conductor of each unit coil. The invention further discloses a magnetic resonance imaging system. Due to the fact that breakpoints are set in the coil conductors and capacitors are connected to the breakpoints, the electromagnetic field distribution in the radio frequency coil is changed, and clearer magnetic resonance images are obtained.
Description
technical field [0001] The invention relates to a magnetic resonance imaging system, in particular to a magnetic resonance radio frequency coil and a magnetic resonance imaging system. Background technique [0002] The magnetic resonance imaging system is a device that generates two-dimensional or three-dimensional images of samples based on the principle of nuclear magnetic resonance imaging. Common nuclear magnetic resonance imaging systems generally include: generating a static uniform magnetic field B 0 The magnet; located in the static uniform magnetic field B 0 The radio frequency coil system in the system includes the radio frequency transmitting coil used to excite the sample, and the radio frequency receiving coil used to receive the resonance signal emitted by the sample; the gradient system is used to generate the gradient of the magnetic field in the sample space to facilitate imaging coding; and computer imaging The system is used to process the signals collect...
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Login to View More IPC IPC(8): G01R33/20G01R33/38
Inventor 杨佳强
Owner SHENZHEN RF TECH