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Breast imaging magnetic resonance imaging superconducting magnet system

A technology of magnetic resonance imaging and superconducting magnets, applied in superconducting magnets/coils, magnetic objects, measuring magnetic variables, etc., can solve the problems of difficult interventional surgery and insufficient openness

Active Publication Date: 2013-04-24
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing magnetic resonance imaging superconducting magnet system, such as insufficient openness and difficulty in carrying out interventional surgery, and propose a magnetic resonance imaging superconducting magnet system for breast imaging

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  • Breast imaging magnetic resonance imaging superconducting magnet system
  • Breast imaging magnetic resonance imaging superconducting magnet system
  • Breast imaging magnetic resonance imaging superconducting magnet system

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0014] figure 1 It is a schematic diagram of the coil structure of the magnetic resonance imaging superconducting magnet system for breast imaging according to the embodiment of the present invention. Such as figure 1 As shown, the superconducting magnet system of the present invention consists of an upper cryogenic vessel 1, a lower cryogenic vessel 2, an upper superconducting main coil, an upper superconducting shielding coil 4, a lower superconducting main coil, a lower superconducting shielding coil 6 and a pulse tube refrigerator 17 compositions. The upper cryogenic vessel 1 is composed of an upper liquid helium tank 7 , an upper cold shield 8 and an upper vacuum vessel 9 , and the lower cryogenic vessel 2 is composed of a lower liquid helium tank 10 , a lower cold shield 11 and a lower vacuum vessel 12 . The upper cryogenic container 1...

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Abstract

The invention provides a breast imaging magnetic resonance imaging superconducting magnet system. The superconducting magnet system comprises an upper cryogenic vessel (1), a lower cryogenic vessel (2), an upper superconducting main coil, an upper superconducting shield coil (4), a lower superconductive main coil, a lower under the superconducting shield coil (6) and a pulse tube refrigerator (17). The upper superconducting main coil and the upper superconducting shield coil (4) are mounted in the upper cryogenic vessel (1), the upper cryogenic vessel (1) is provided with a vertical room temperature bore with a diameter of 40 cm. The lower superconductive main coil and the lower under the superconducting shield coil (6) are mounted in the lower cryogenic vessels (2), and a horizontal space with a gap distance of 45 cm is reserved between the upper and the lower superconducting main coil. In the spherical imaging area which is 8 cm upwardly offset the superconducting magnet central and of the diameter 20 cm, the superconducting magnets generate s spatial magnetic field distribution with magnetic field intensity of 1.0T, peak magnetic field uniformity of 15 ppm, and further, 5-Gauss stray field is respectively limited in ellipsoidal ranges with diameters of 3.5 m vertically and 4.0 m horizontally.

Description

technical field [0001] The invention relates to an open type magnetic resonance imaging superconducting magnet system. Background technique [0002] Whole-body magnetic resonance imaging (Magnetic Resonance Imaging, MRI) generally needs to generate a highly uniform magnetic field distribution with a peak-to-peak nonuniformity of better than 20 ppm (parts per million, ppm) within a sphere with a diameter of 40-50 cm. Magnetic resonance imaging superconducting magnets are composed of solenoid coils. Traditional magnetic resonance imaging superconducting magnets provide a hollow cylindrical room temperature hole with a diameter greater than 70 cm that meets the needs of patients for whole-body imaging. When a patient undergoes magnetic resonance imaging, he needs to enter the central magnetic field uniform area from one end of the long and narrow room temperature hole for imaging diagnosis. A large number of clinical experiments have shown that patients generally experience sy...

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Application Information

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IPC IPC(8): H01F6/00H01F6/04H01F6/06G01R33/3815
Inventor 倪志鹏王秋良李兰凯严陆光
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI