Superconducting liquid-helium-free limb magnetic resonance imaging system

Abstract

The utility model discloses a superconducting liquid-helium-free limb magnetic resonance imaging system which comprises a magnet support, a cylindrical superconducting magnet unit, a receiving and transmitting integrated coil, an imaging area and a seat. The cylindrical superconducting magnet unit is fixed on the magnet bracket, and the opening direction of the cylindrical superconducting magnet unit is vertical to the opening direction of the magnet bracket; an imaging area is arranged in the magnet, and the receiving and transmitting integrated coil is fixed in the cylindrical superconducting magnet unit to form the imaging area. According to the utility model, the cylindrical superconducting magnet is adopted, only a scanning part is placed in the center of the magnet, and a patient does not need to be examined in a closed environment; a transmitting and receiving integrated coil is adopted, so that the Q value, the uniformity and the linearity are higher, and the power consumption is lower; the inspected area is always located in the center of the magnetic field and in the area with the magnetic field uniformity meeting the standard; the lifting seat ensures that the scanned area of the patient is always in the center of the magnetic field, and image quality can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of limb magnetic resonance imaging, in particular to a superconducting liquid helium-free limb magnetic resonance imaging system. Background Art

[0002] Magnetic resonance imaging (MRI) system is a commonly used medical imaging device. It uses the nuclear magnetic resonance phenomenon of hydrogen nuclei (protons) in human tissues after being excited by radio frequency pulses in a magnetic field to generate magnetic resonance signals, and reconstructs the image of a certain layer of the human body through electronic computer processing.

[0003] Existing superconducting magnetic resonance imaging systems require patients to lie flat in a cylindrical magnet when examining them. In this position, the scanned area (such as hands and legs) has to be placed at the edge of the magnetic field due to the aperture limit of the magnet. Due to the low uniformity of the magnetic field in the edge area, it is not guaranteed that high-quality images with clinical value can be obtained during the scan. The cost of repeated scans is reduced patient comfort, increased chances of claustrophobia symptoms in patients, and disruption of the normal examination process in the hospital. Utility Model Content

[0004] The utility model aims to provide a superconducting liquid helium-free limb magnetic resonance imaging system to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a superconducting liquid helium-free limb magnetic resonance imaging system, comprising a magnet bracket, a cylindrical superconducting magnet unit, a transceiver integrated coil, an imaging area and a seat; the liquid helium-free superconducting magnet does not use liquid helium, thus avoiding the trouble of liquid helium consumption, and can automatically raise and lower the field, making the product lighter, easier to install and maintain, and lower in cost.

[0006] The cylindrical superconducting magnet unit is fixed on the magnet bracket, and the opening of the cylindrical superconducting magnet unit is kept perpendicular to the opening direction of the magnet bracket; by using a cylindrical superconducting magnet, only the scanning part is placed at the center of the magnet, and the patient does not need to be examined in a closed environment.

[0007] An imaging area is arranged in the magnet, and the transceiver-in-one coil is fixed in the cylindrical superconducting magnet unit to form the imaging area.

[0008] Preferably, it also includes a power amplifier and a spectrometer.

[0009] Preferably, gradient coils and shim coils are provided around the cylindrical superconducting magnet unit.

[0010] Preferably, the transceiver integrated coil adopts a radio frequency transmitting and receiving integrated coil; the use of an integrated transmitting and receiving coil makes the Q value, uniformity, linearity higher and the power consumption lower.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. Cylindrical scanning environment: Using a cylindrical superconducting magnet, only the scanning part is placed at the center of the magnet, and the patient does not need to be examined in a closed environment.

[0013] 2. Integrated transmitting and receiving coil: The integrated transmitting and receiving coil is used to make the Q value, uniformity, linearity higher and power consumption lower.

[0014] 3. The examined area is always in the center of the magnetic field, and the magnetic field uniformity meets the standard area; by moving forward and backward and raising and lowering the chair to ensure that the patient's scanned area is always in the center of the magnetic field, it helps to improve image quality.

[0015] 4. Liquid helium-free superconducting magnet: No liquid helium is used, eliminating the trouble of liquid helium consumption, and the magnet can be automatically raised and lowered, making the product lighter, easier to install and maintain, and lower in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the wrist joint or elbow joint imaging of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the knee joint or ankle joint imaging of the utility model;

[0020] Figure 4 It is a structural schematic diagram of another posture of wrist joint or elbow joint imaging of the utility model.

[0021] In the figure: 1. Magnet bracket; 2. Cylindrical superconducting magnet unit; 3. Transceiver-transmitter coil; 4. Imaging area; 5. Seat. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0023] See also Figure 1-3 In an embodiment of the utility model, a superconducting liquid helium-free limb magnetic resonance imaging system includes a magnet support 1, a cylindrical superconducting magnet unit 2, a transceiver coil 3, an imaging area 4 and a seat 5 (the seat is an adjustable seat); the cylindrical superconducting magnet unit 2 is fixed on the magnet support 1, and the opening of the cylindrical superconducting magnet unit 2 is kept perpendicular to the opening direction of the magnet support 1; an imaging area 4 is provided in the magnet, and the transceiver coil 3 is fixed in the cylindrical superconducting magnet unit 2 to constitute the imaging area 4; gradient coils and shim coils are provided around the cylindrical superconducting magnet unit 2; the transceiver coil 3 adopts a radio frequency transmitting and receiving integrated coil.

[0024] Cylindrical scanning environment: Using a cylindrical superconducting magnet, the scanning area is only placed at the center of the magnet, and the patient does not need to be examined in a closed environment.

[0025] Integrated transmitting and receiving coil: The integrated transmitting and receiving coil makes the Q value, uniformity, linearity higher and the power consumption lower.

[0026] The examined area is always in the center of the magnetic field, and the magnetic field uniformity meets the standard area; by moving forward and backward and raising and lowering the chair, the patient's scanned area is always in the center of the magnetic field, which helps to improve image quality.

[0027] Liquid helium-free superconducting magnet: does not use liquid helium, avoids the trouble of liquid helium consumption, can automatically raise and lower the field, making the product lighter, easier to install and maintain, and lower in cost.

[0028] Also includes a power amplifier and a spectrometer.

[0029] Working principle: Place the transceiver coil 3 in the cylindrical superconducting magnet unit 2; place the patient on the chair 5 in a sitting or lying position; place the patient's scanned area in the imaging area 4 to perform magnetic resonance imaging; the examined area is always in the center of the magnetic field, and the magnetic field uniformity meets the standard area; by moving back and forth and raising and lowering the chair, the patient's scanned area is always in the center of the magnetic field, which helps to improve the image quality; no liquid helium is used, so there is no need to worry about liquid helium consumption, and the field can be automatically raised and lowered, making the product lighter, easier to install and maintain, and lower in cost.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A superconducting liquid helium-free limb magnetic resonance imaging system, characterized in that: It comprises a magnet support (1), a cylindrical superconducting magnet unit (2), a transceiver coil (3), an imaging area (4) and a seat (5); The cylindrical superconducting magnet unit (2) is fixed on the magnet support (1), and the opening of the cylindrical superconducting magnet unit (2) is kept perpendicular to the opening direction of the magnet support (1); An imaging area (4) is provided in the magnet, and the transceiver-transmitter coil (3) is fixed in the cylindrical superconducting magnet unit (2) to form the imaging area (4).

2. A superconducting liquid helium-free limb magnetic resonance imaging system according to claim 1, characterized in that: Also includes a power amplifier and a spectrometer.

3. The superconducting liquid helium-free limb magnetic resonance imaging system according to claim 1, characterized in that: A gradient coil and a shim coil are arranged around the cylindrical superconducting magnet unit (2).

4. The superconducting liquid helium-free limb magnetic resonance imaging system according to claim 1, characterized in that: The transceiver integrated coil (3) adopts a radio frequency transmitting and receiving integrated coil.

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