Clamp device for debugging magnetic resonance radio frequency coil

Abstract

The utility model relates to the technical field of magnetic resonance radio frequency coils, in particular to a clamp device for debugging a magnetic resonance radio frequency coil. According to the clamp device for debugging the magnetic resonance radio frequency coil, an alligator clip is formed by connecting two clip bodies, a coaxial cable comprises an inner conductor and an outer layer shielding net, and the clamp device is characterized in that the head parts of the two clip bodies are respectively a first clip head and a second clip head, and the inner sides of the first clip head and the second clip head are respectively connected with a first copper block and a second copper block; one end of the first copper block and one end of the second copper block are connected to an inner conductor and an outer shielding net of a coaxial cable respectively, and the coaxial cable is connected to a network analyzer. Compared with the prior art, two parts of the device, which are in contact with two ends of an electronic component, are insulated from each other, are respectively welded on an inner conductor and an outer shielding net of a coaxial cable, are used for being connected with a network analyzer or other measuring equipment, and can be used for simultaneously measuring and debugging signals of a plurality of places of the magnetic resonance radio frequency coil.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic resonance radio frequency coils, in particular to a clamp device used for debugging magnetic resonance radio frequency coils. Background Art

[0002] Magnetic resonance imaging (MRI) is an advanced, non-destructive imaging technology for the human body, widely used in medical imaging diagnosis of diseases in various parts of the body. The MRI radiofrequency coil is a key component of the MRI system, and its performance directly determines the quality of the MRI image.

[0003] MRI radio frequency coils are used to transmit radio frequency pulses and receive magnetic resonance signals, making them a core component of magnetic resonance imaging systems. As the front end of the signal reception chain, the RF receive coil is crucial to image quality, requiring meticulous tuning during R&D and production. Except for the simplest single-channel RF coils, all RF receive coils have multiple channels, with 32- and 64-channel RF receive coils being the most popular. In an RF receive coil, any two channels will interact with each other, necessitating isolation tuning. During MRI coil tuning, the signals from an electronic component (typically a capacitor) in each channel are first connected via coaxial cables to a network analyzer for testing. The electrical parameters of the channels are then adjusted to ensure that the signals entering the network analyzer meet technical requirements. Next, the isolation between the channels is adjusted by simultaneously inputting the signals from both channels into the two ports of the network analyzer for measurement. The electrical parameters of the two channels and their interaction are then adjusted to ensure that the isolation between them meets design requirements.

[0004] During the debugging process of a magnetic resonance radio frequency coil, it is necessary to collect signals from multiple different electronic components. The typical procedure is to solder the core wire and external shielding mesh of a coaxial cable (one end of which is connected to a network analyzer for signal acquisition) to the ends of the electronic component. After the signal acquisition and debugging is complete, the core wire and shielding mesh of the coaxial cable are then soldered off the ends of the component and then to the ends of the electronic component to be tested. Each coil, especially a multi-channel coil, requires repeated measurements of different electronic components. This requires multiple times of soldering and unsoldering the coaxial cable, which is time-consuming and labor-intensive. Furthermore, repeated high-temperature soldering can have a certain impact on the lifespan and performance of the electronic components. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a fixture device for debugging a magnetic resonance radio frequency coil, which can conveniently measure and debug multiple channels of the magnetic resonance radio frequency coil.

[0006] To achieve the above objectives, a clamp device for debugging a magnetic resonance radio frequency coil is designed, comprising an alligator clip and a coaxial cable. The alligator clip is formed by connecting two clamping bodies, and the coaxial cable comprises an inner conductor and an outer shielding mesh. The clamp device is characterized in that the heads of the two clamping bodies are respectively a first clamping head and a second clamping head, and the inner sides of the first clamping head and the second clamping head are respectively connected to a first copper block and a second copper block. One end of the first copper block and the second copper block are respectively connected to the inner conductor and the outer shielding mesh of the coaxial cable, and the coaxial cable is connected to a network analyzer.

[0007] The first copper block is connected to the inner side of the first clamp, and an insulator is provided between the first copper block and the inner side of the first clamp.

[0008] The second copper block is connected to the inner side of the second clamp, and an insulator is provided between the second copper block and the inner side of the second clamp.

[0009] One end of the coaxial cable is connected to the first copper block and the second copper block through an inner conductor and an outer shielding mesh. The other end of the coaxial cable is welded with a BNC connector, which is connected to a network analyzer or other measuring equipment.

[0010] The tails of the alligator clips are connected via an elastic or spring structure.

[0011] Compared with the prior art, the two parts of the device that contact the two ends of the electronic components are insulated from each other and are respectively welded to the inner conductor and outer shielding net of a coaxial cable. The other end of the coaxial cable is welded with a BNC connector for connecting to a network analyzer or other measuring equipment, so that signals at multiple locations of the magnetic resonance radio frequency coil can be measured and debugged simultaneously.

[0012] When debugging the magnetic resonance radio frequency coil, clamp the fixture on the electronic component whose signal needs to be measured, and connect the other end to a network analyzer or other measurement equipment, so that the coil can be measured and debugged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model.

[0014] See also Figure 1 , 1 is the first clamp, 2 is the second clamp, 3 is the inner conductor, 4 is the outer shielding mesh, 5 is the coaxial cable, 6 is the alligator clip, 7 is the first copper block, and 8 is the second copper block. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figure 1As shown, the alligator clip 6 is composed of two clamping bodies connected together. The coaxial cable 5 includes an inner conductor and an outer shielding mesh. The heads of the two clamping bodies are respectively a first clamping head 1 and a second clamping head 2. The inner sides of the first clamping head 1 and the second clamping head 2 are respectively connected to a first copper block 7 and a second copper block 8. One end of the first copper block 7 and the second copper block 8 are respectively connected to the inner conductor 3 and the outer shielding mesh 4 of the coaxial cable 5. The coaxial cable 5 is connected to a network analyzer.

[0017] The first copper block 7 is connected to the inner side of the first clamp 1 , and an insulator is provided between the first copper block 7 and the inner side of the first clamp 1 .

[0018] The second copper block 8 is connected to the inner side of the second clamp 2 , and an insulator is provided between the second copper block 8 and the inner side of the second clamp 2 .

[0019] One end of the coaxial cable 5 is connected to the first copper block 7 and the second copper block 8 through the inner conductor 3 and the outer shielding mesh 4. The other end of the coaxial cable 5 is welded with a BNC connector, which is connected to a network analyzer or other measuring equipment.

[0020] The tails of the alligator clips 6 are connected via an elastic or spring structure.

[0021] When debugging the frequency of a channel of the magnetic resonance radio frequency coil, the first clamp 1 and the second clamp 2 of the alligator clip 6 of the device are respectively clamped on the two electrodes of the appropriate block capacitor of this channel and connected to one end of the coaxial cable 5. The BNC connector at the other end of the coaxial cable 5 is plugged into the network analyzer to obtain information such as the frequency of this channel, thereby enabling measurement and debugging.

[0022] When it is necessary to measure the isolation of two channels of the magnetic resonance radio frequency coil, the first clamp 1 and the second clamp 2 of the alligator clip 6 are respectively clamped on the appropriate capacitors of the two channels and connected to one end of the coaxial cable 5. The BNC plug at the other end of the coaxial cable 5 is plugged into the network analyzer. Then, information such as the isolation of the two channels can be obtained on the network analyzer for measurement and debugging.

[0023] When measuring and debugging another channel of the MRI RF coil, simply remove the alligator clip 6 from the fixture and clip it onto the appropriate block capacitor for the other channel. This makes switching between channels easy, eliminating the need for soldering capacitors with an iron. The copper sheet on the header is highly conductive and relatively soft, preventing any damage to the capacitor.

[0024] In summary, the use of the device of the present invention to debug the magnetic resonance radio frequency coil is convenient and quick without damaging components.

Claims

1. A fixture device for debugging a magnetic resonance radio frequency coil, comprising an alligator clip and a coaxial cable, wherein the alligator clip (6) is formed by connecting two clamping bodies, and the coaxial cable (5) comprises an inner conductor and an outer shielding mesh, characterized in that: The heads of the two clamps are respectively a first clamp (1) and a second clamp (2), and the inner sides of the first clamp (1) and the second clamp (2) are respectively connected to a first copper block (7) and a second copper block (8), and one end of the first copper block (7) and the second copper block (8) are respectively connected to the inner conductor (3) and the outer shielding net (4) of the coaxial cable (5), and the coaxial cable (5) is connected to a network analyzer.

2. The fixture device for debugging a magnetic resonance radio frequency coil according to claim 1, characterized in that: The first copper block (7) is connected to the inner side of the first clamp (1), and an insulator is provided between the first copper block (7) and the inner side of the first clamp (1).

3. The fixture device for debugging a magnetic resonance radio frequency coil according to claim 1, characterized in that: The second copper block (8) is connected to the inner side of the second clamp (2), and an insulator is provided between the second copper block (8) and the inner side of the second clamp (2).

4. The fixture device for debugging a magnetic resonance radio frequency coil according to claim 1, characterized in that: One end of the coaxial cable (5) is connected to the first copper block (7) and the second copper block (8) through the inner conductor (3) and the outer shielding mesh (4), and the other end of the coaxial cable (5) is welded with a BNC connector, which is connected to a network analyzer or a measuring device.

5. The fixture device for debugging a magnetic resonance radio frequency coil according to claim 1, characterized in that: The tails of the alligator clips (6) are connected via an elastic structure.

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