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    • 95. 发明授权
    • RF shielded room for NMR imaging system
    • RF屏蔽室用于NMR成像系统
    • US4613820A
    • 1986-09-23
    • US597803
    • 1984-04-06
    • William A. EdelsteinDavid R. EisnerRowland W. RedingtonLowell S. Smith
    • William A. EdelsteinDavid R. EisnerRowland W. RedingtonLowell S. Smith
    • A61B5/055A61B10/00E04H5/02E04H5/06G01D11/24G01R33/32G01R33/42G01R33/422G12B17/02H05K9/00G01R33/20
    • H05K9/00G01D11/24G01R33/42G01R33/422Y10S505/844Y10S505/872
    • A radio-frequency shielded room for a nuclear magnetic resonance imaging system has at least one electrically-conductive shield wall substantially enclosing a predetermined volume adjacent to one end of the bore formed through an imaging magnet within which bore the imaging process is carried out. The at least one wall has an aperture therethrough substantially at and in registration with the one bore end. A hollow shield member, of an electrically-conductive material, extends through the magnet bore and has a first end region periphery aligned with and substantially electrically connected to the entire periphery of the aperture in the at least one wall. A second end of hollow shield member extends at least to the remaining end of the magnet bore, where it is enclosed with an electrically-conductive cap substantially electrically connected about the entire periphery of the hollow shield member second end. The at least one wall, the hollow shield member and the second end cap form a shielded room substantially completely enclosing the volume extending through the magnet bore and adjacent to one end thereof, which volume is effectively shielded from radio frequency signals emanating from outside the enclosed volume.
    • 用于核磁共振成像系统的射频屏蔽室具有至少一个导电屏蔽壁,其基本上围绕通过成像磁体形成的孔的一端附近的预定体积,在该孔内进行成像处理。 所述至少一个壁具有基本上与所述一个孔端部对准并与其一致的孔。 导电材料的中空屏蔽构件延伸穿过磁体孔,并且具有与至少一个壁中的孔的整个周边对准并基本上电连接的第一端区周边。 中空屏蔽构件的第二端至少延伸到磁体孔的剩余端部,在那里其被围绕中空屏蔽构件第二端的整个周边基本上电连接的导电盖封闭。 所述至少一个壁,所述中空屏蔽构件和所述第二端盖形成屏蔽室,其基本上完全包围延伸通过所述磁体孔并且邻近所述磁体孔的体积,所述体积被有效地屏蔽在从封闭的外部发出的射频信号 卷。