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Radio frequency transmitting coil for vertical field magnetic resonant imaging system

A technology of magnetic resonance imaging and radio frequency coils, which is applied in magnetic resonance measurement, material analysis through resonance, magnetic property measurement, etc., can solve the problems of mutual influence of coil groups and reduction of coil efficiency, and achieve simple and convenient tuning, improved efficiency, Mutual inductance calculations for precise effects

Inactive Publication Date: 2007-01-24
北京海思威科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of their structure are: it is necessary to adjust the current distribution of each coil group separately to achieve the required RF field perpendicular to the main magnetic field; at the same time, it is also necessary to adjust the frequency of each coil group; thirdly, when implementing the above adjustments, the coil group Will affect each other; Fourth, if the shielding layer is used to solve the current loop problem, the efficiency of the coil will be reduced

Method used

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  • Radio frequency transmitting coil for vertical field magnetic resonant imaging system
  • Radio frequency transmitting coil for vertical field magnetic resonant imaging system
  • Radio frequency transmitting coil for vertical field magnetic resonant imaging system

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Embodiment Construction

[0019] Such as image 3 As shown, the present invention includes such as figure 1 The structural unit 1, the structural unit 2, the coaxial cables 3 and 4, the power splitter 5 and the radio frequency amplifier 6 are shown. In structural units 1 and 2, the capacitors are distributed on two sides at equal intervals, and the six rungs are basically evenly connected on the two sides. The coaxial cables 3 and 4 connect the trapezoidal structure to the power divider 5 through capacitive coupling, and the power The splitter is connected to the radio frequency amplification device through the cable 6.

[0020] In order to improve the efficiency of radio frequency transmission, it is also possible to image 3 The coil group shown is rotated 90 degrees around the center line of the two polar plates to form another coil group. The two coil groups are combined to form an orthogonally distributed radio frequency field between the plates, which increases the radio frequency emission effi...

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Abstract

The RF transmitting coil for vertical field magnetic resonant imaging system includes two parallel trapezoidal coils set separately near two pole plates of the magnet and two capacitors with the same capacitance. Each of the trapezoidal coils includes two bevel sides of conductor and two connecting crosspieces, and the capacitor may be set in the crosspiece or the bevel side. By means of regulating the inductance or the capacitance, required resonant mode may be reached. The present invention has regular coil structure, precise mutual inductance calculation and high coil efficiency.

Description

technical field [0001] The invention relates to a magnetic resonance imaging device, in particular to a magnetic resonance imaging radio frequency coil. Background technique [0002] Magnetic resonance imaging (MRI) is realized by using spatial encoding technology, and it is a technology to visualize the nuclear magnetic resonance signal reflecting the time and space of the material inside the object. Place the human body in a stable magnetic field, then add a gradient magnetic field, and then use an appropriate radio frequency (RF) field to act on the imaged human body. After detecting the interaction with the human body, the electromagnetic wave carrying the human body information can display the inside of the object. The information of anatomy, physiology and psychology is displayed in the form of images, which are used for scientific research on the human body and diagnosis and treatment of human diseases. [0003] The role of the radio frequency coil in the MRI system ...

Claims

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Application Information

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IPC IPC(8): A61B5/055G01R33/20
Inventor 包尚联张宏杰
Owner 北京海思威科技有限公司