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    • 6. 发明授权
    • Cryocooler interface sleeve
    • 冷却器接口套管
    • US06438966B1
    • 2002-08-27
    • US09881642
    • 2001-06-13
    • Raymond E. SarwinskiWilliam E. StonecipherBruce C. Breneman
    • Raymond E. SarwinskiWilliam E. StonecipherBruce C. Breneman
    • F25B900
    • F25D19/006F25B9/10H01F6/04
    • A sleeve assembly for thermally interconnecting a pulse tube, two stage cryocooler with a superconducting device includes a heat transfer cylinder, a heat transfer receptacle and a wall extending therebetween to define a passageway. The heat transfer receptacle is formed with a tapered recess wherein a tapered cooling probe of the cryocooler is urged against the heat transfer receptacle to establish thermal communication therebetween. A cooling element of the cryocooler is disposed in the heat transfer cylinder to establish thermal communication therebetween. In operation, the cryocooler moves relative to the sleeve assembly between a first configuration wherein the cryocooler is engaged with the sleeve assembly to establish thermal communication therebetween and a second configuration wherein the cryocooler is disengaged with the sleeve assembly. An expandable bellows which interconnects the cryocooler with the sleeve assembly will maintain thermal insulation therebetween when the cryocooler is disengaged from the sleeve assembly.
    • 用于将脉冲管,两级制冷器与超导装置热互连的套筒组件包括传热圆筒,传热容器和在其间延伸以限定通道的壁。 传热容器形成有锥形凹槽,其中低温冷却器的锥形冷却探针被推靠在传热容器上以在它们之间建立热连通。 低温冷却器的冷却元件设置在传热圆筒中,以在它们之间建立热连通。 在操作中,低温冷却器相对于套筒组件在第一配置之间移动,其中低温冷却器与套筒组件接合以在其间建立热连通,而第二配置,其中低温冷却器与套筒组件分离。 将低温冷却器与套管组件相互连接的可膨胀波纹管在低温冷却器与套筒组件脱离接合时将保持其间的热绝缘。
    • 7. 发明授权
    • Cooling apparatus for MRI magnet system and method of use
    • MRI磁体系统的冷却装置及其使用方法
    • US4782671A
    • 1988-11-08
    • US101516
    • 1987-09-28
    • Bruce C. BrenemanRaymond E. Sarwinski
    • Bruce C. BrenemanRaymond E. Sarwinski
    • A61B10/00A61B5/055F17C3/08F25J1/00G01R33/20G01R33/38G01R33/3815H01F7/20H01L39/00H05K9/00F25B19/00
    • F25J1/0276F17C3/085G01R33/3815F17C2201/0119F17C2203/0312F17C2203/032F17C2203/0391F17C2221/014F17C2221/017F17C2223/0161F17C2223/033F17C2227/0341F17C2265/034F17C2270/0509F17C2270/0536F25J2290/42
    • An improvement in cooling apparatus in a magnet system for providing a localized, substantially homogeneous magnetic field for use in magnetic resonance imaging. The magnet system includes a vacuum vessel, a cryogenic containment vessel inside the vacuum vessel and having a coil of superconductive wire along with a quantity of liquid helium to maintain the wire below its critical temperature. The system also includes an inner thermal radiation shield between the containment vessel and the vacuum vessel and an outer thermal radiation shield between the inner shield and the vacuum vessel. A cryogenic refrigerator is supported by the vacuum vessel and extends inside. This refrigerator has a first-stage heat station cooling the outer shield and second-stage heat station for cooling the inner shield. The improvement includes the provision of a tank holding a quantity of liquid nitrogen. This tank is supported in good heat transfer relationship with the first-stage heat station between the vacuum vessel and the outer shield and is spaced from the outer shield. Tubing is provided for transferring the liquid nitrogen from the tank so that it boils in good heat transfer relationship with the outer shield and also returns gas resulting from the boiling of the liquid nitrogen back to the tank where the refrigerator condenses it in the tank. A method of using the cooling apparatus in the event the refrigerator is not functional, is also disclosed.
    • 用于提供用于磁共振成像的局部的,基本均匀的磁场的磁体系统中的冷却装置的改进。 磁体系统包括真空容器,真空容器内部的低温容纳容器,并且具有一束超导线以及一定量的液氦,以将电线保持在其临界温度以下。 该系统还包括在容纳容器和真空容器之间的内部热辐射屏蔽以及内部屏蔽和真空容器之间的外部热辐射屏蔽。 低温冰箱由真空容器支撑并在内部延伸。 该冰箱具有冷却外屏蔽的第一级加热站和用于冷却内屏蔽的第二级加热站。 改进之处在于提供容纳液氮的罐。 该罐与真空容器和外罩之间的第一级加热站具有良好的传热关系,并与外护罩间隔开。 提供管道用于从罐转移液氮,使得其与外部屏蔽件具有良好的热传递关系,并且将从液氮的沸腾产生的气体返回到罐中,其中冰箱将其冷凝在罐中。 还公开了在冰箱不起作用的情况下使用冷却装置的方法。
    • 8. 发明授权
    • MRI magnet and MRI system with optimized fringe fields, attractive forces and spatial constraints
    • MRI磁体和MRI系统具有优化的边缘场,吸引力和空间限制
    • US08729899B2
    • 2014-05-20
    • US13178805
    • 2011-07-08
    • Michael StecknerBruce C. Breneman
    • Michael StecknerBruce C. Breneman
    • G01V3/00
    • G01R33/421
    • A magnetic resonance imaging (MRI) system magnet includes at least one main electromagnet winding disposed within a first radius of the magnet and at least one bucking electromagnet winding disposed within a second radius, larger than the first radius of the magnet and configured to provide self-shielding magnetic fields that substantially reduce fringe magnetic fields outside the magnet produced by the main electromagnet winding. The combination of magnetic fields produced by both the main and bucking electromagnet windings inside the magnet conform to MRI requirements within at least an imaging volume. The main and bucking electro-magnet windings are configured so as to create a net fringe field outside the magnet within the range of 50-100 gauss at a distance within a range of 3-5 meters axially and 2-3 meters radially from a center of the magnet.
    • 磁共振成像(MRI)系统磁体包括设置在磁体的第一半径内的至少一个主电磁体绕组和设置在第二半径内的至少一个屈曲电磁体绕组,其大于磁体的第一半径并且被配置为提供自身 所述磁场基本上减少由主电磁铁绕组产生的磁体外的边缘磁场。 磁体内部的主电磁铁和屈曲电磁铁绕组产生的磁场的组合符合至少一个成像体积内的MRI要求。 主电磁铁绕组被构造成在50-100高斯的范围内在磁体外部产生一个净边缘场,距离在3-5米的范围内,距中心径向2-3米 的磁铁。
    • 9. 发明申请
    • MRI MAGNET AND MRI SYSTEM WITH OPTIMIZED FRINGE FIELDS, ATTRACTIVE FORCES AND SPATIAL CONSTRAINTS
    • 具有优化的FRINGE字段,吸引力和空间约束的MRI磁体和MRI系统
    • US20130009642A1
    • 2013-01-10
    • US13178805
    • 2011-07-08
    • Michael StecknerBruce C. Breneman
    • Michael StecknerBruce C. Breneman
    • G01R33/44
    • G01R33/421
    • A magnetic resonance imaging (MRI) system magnet includes at least one main electromagnet winding disposed within a first radius of the magnet and at least one bucking electromagnet winding disposed within a second radius, larger than the first radius of the magnet and configured to provide self-shielding magnetic fields that substantially reduce fringe magnetic fields outside the magnet produced by the main electromagnet winding. The combination of magnetic fields produced by both the main and bucking electromagnet windings inside the magnet conform to MRI requirements within at least an imaging volume. The main and bucking electro-magnet windings are configured so as to create a net fringe field outside the magnet within the range of 50-100 gauss at a distance within a range of 3-5 meters axially and 2-3 meters radially from a center of the magnet.
    • 磁共振成像(MRI)系统磁体包括设置在磁体的第一半径内的至少一个主电磁体绕组和设置在第二半径内的至少一个屈曲电磁体绕组,其大于磁体的第一半径并且被配置为提供自身 所述磁场基本上减少由主电磁铁绕组产生的磁体外的边缘磁场。 磁体内部的主电磁铁和屈曲电磁铁绕组产生的磁场的组合符合至少一个成像体积内的MRI要求。 主电磁铁绕组被构造成在50-100高斯的范围内在磁体外部产生一个净边缘场,距离在3-5米的范围内,距中心径向2-3米 的磁铁。