Double-frequency radio-frequency coil

A technology of radio frequency coils and coils, which is applied in magnetic resonance measurement, medical science, sensors, etc., can solve the problems of not being universal, not being able to apply two field strength systems at the same time, and increasing the cost of purchasing coils in hospitals, so as to achieve the goal of reducing procurement costs Effect

Active Publication Date: 2013-08-21
SHENZHEN UNITED IMAGING HEALTHCARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing dual-frequency coils can resonate at two frequencies, but cannot be used in two field strength systems at the same time
For example, it can only be applied to 1.5T magnetic resonance system, or only to 3T magnetic resonance system, which requires hospitals that purchase systems with diff

Method used

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  • Double-frequency radio-frequency coil
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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] figure 1 It is a schematic diagram of a dual-frequency radio frequency coil circuit according to an embodiment of the present invention.

[0025] See figure 1 The dual-frequency radio frequency coil provided by the present invention includes at least one coil unit, and the coil unit includes a closed loop formed by a dual-frequency tuning circuit 1, a dual-frequency detuning circuit 2, a dual-frequency coil matching circuit 3 and a capacitor C1, And a preamplifier 4; one end of the dual-frequency coil matching circuit 3 is connected to the input terminal (In) of the preamplifier 4 through a capacitor C5, and the other end is connected to the ground terminal (GND) of the preamplifier 4, and the preamplifier The output (Out) of the amplifier (Amplifier) ​​4 is connected to a dual-frequency radio frequency balun circuit (RF Trap circuit) 5; the RF...

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Abstract

The invention discloses a double-frequency radio-frequency coil which comprises at least one coil unit, wherein each coil unit comprises a closed loop circuit and a pre-amplifier, each closed loop circuit is composed of a double-frequency tuned circuit, a double-frequency detuned circuit, a double-frequency coil matching circuit and a capacitor C1, one end of the double-frequency coil matching circuit is connected with an input terminal (In) of the pre-amplifier through a capacitor C5, the other end of the double-frequency coil matching circuit is connected with a ground terminal (GND) of the pre-amplifier, and an output terminal (Out) of the pre-amplifier is connected with a double-frequency radio-frequency Balun circuit. According to the double-frequency radio-frequency coil, due to the fact that the double-frequency detuned circuit and the double-frequency radio-frequency Balun circuit can work under two frequencies and the double-frequency tuned circuit is also double-frequency, then the double-frequency radio-frequency coil can work under two frequency points, accordingly the double-frequency radio-frequency coil can be suitable for two nuclear magnetic resonance systems with different field intensity, and coil purchasing cost of hospitals is reduced.

Description

technical field [0001] The invention relates to a radio frequency coil, in particular to a dual frequency radio frequency coil for magnetic resonance imaging. Background technique [0002] Magnetic Resonance Imaging (MRI for short) technology is to send radio frequency pulses to the human body through radio frequency transmitting coils to stimulate the resonance of atomic nuclei (such as hydrogen nuclei) at specific frequencies in the human body to generate magnetic resonance signals, which will be received by radio frequency receiving coils. The signal is processed by a computer to perform medical imaging on the human body. [0003] Dual-frequency coils are sensitive to magnetic resonance signals generated by nuclei of two specific frequencies. At present, dual-frequency coils are generally only used for spectral research, for the quantitative analysis of another element other than H (hydrogen), such as Na, P, etc. Usually, the H nuclear image is used to locate the regio...

Claims

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Application Information

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IPC IPC(8): G01R33/34A61B5/055
Inventor 张强
Owner SHENZHEN UNITED IMAGING HEALTHCARE CO LTD
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