Cable for nuclear magnetic resonance instruments

Abstract

The invention discloses a cable for nuclear magnetic resonance instruments, and belongs to the technical field of special wires and cables for medical instruments. The cable comprises a cable core, aninner braided layer, an outer braided layer, an isolation layer and a sheath layer. The inner braided layer, the outer braided layer, the isolation layer and the sheath layer are sequentially arranged outside the cable core, the cable core comprises a shielding layer, control lines and power lines, the control lines and the power lines are positioned in the shielding layer, the inner braided layer is positioned outside the shielding layer, tin-plated copper wires are braided to form the inner braided layer, tin-plated copper wires are braided to form the outer braided layer, the isolation layer is made of isolation paper, and the sheath layer is made of polyurethane and is extruded and coated outside the isolation layer by means of armor extrusion. The cable has the advantages that the cable is excellent in dielectric ability, the outer diameter of the cable core can be reduced, and the stability of dielectric constants and the excellent signal transmission capacity can be guaranteed;the cable is flexible and is excellent in electromagnetic interference resistance; the cable is high in strength and elastic modulus, is excellent in low-temperature resistance and alcohol tolerance,is excellent in resistance to chemical corrosion of ETO (ethylene oxide) and the like and is perfect in ultraviolet radiation resistance.

Description

technical field [0001] The invention belongs to the technical field of special wires and cables for medical instruments, and in particular relates to a cable for a nuclear magnetic resonance instrument. Background technique [0002] The abbreviation of the aforementioned nuclear magnetic resonance instrument is MRI, which is another major advancement in medical imaging after CT. Since its application in the 1970s, it has been developing at an extremely fast speed. The basic principle of nuclear magnetic resonance is: put the human body in a special magnetic field, use radio frequency pulses to excite the hydrogen nuclei in the human body, cause the hydrogen nuclei to resonate, and absorb energy. After the radio frequency pulse is stopped, the hydrogen nucleus emits an electrical signal at a specific frequency and releases the absorbed energy, which is recorded by an external receiver and processed by an electronic computer to obtain an image, which is called nuclear magneti...

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Problems solved by technology

However, perhaps due to the above-mentioned strict cable technical requirements, the current nuclear magnetic resonance instrument cables in my country basically rely on imports, and there is no technical information about such cables in the Chinese patent documents published so far.

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