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    • 46. 发明公开
    • RF-safe interventional or non-interventional instrument for use in an MRI apparatus
    • RF-sicheres干预器在nicht介入器仪器zur Verwendung在einer MRI-Vorrichtung
    • EP2597481A1
    • 2013-05-29
    • EP11190077.5
    • 2011-11-22
    • Koninklijke Philips Electronics N.V.Philips Intellectual Property & Standards GmbH
    • Weiss, SteffenLips, OliverDavid, Bernd
    • G01R33/28
    • G01R33/288
    • An RF-safe interventional or a non-interventional instrument is disclosed for use during an MR imaging or MR examination of an examination object (A), which instrument is made of or comprises at least one longitudinal or elongated electrically conductive element (1, 3), especially in the form of a conductor or wire or line for feeding electrical signals, or in the form of the instrument itself or a component or a part thereof, which is not provided for feeding electrical signals but nevertheless electrically conductive, wherein all such elements are subject to RF common mode currents which are induced in the element when the instrument or element is exposed to an RF/MR excitation field generated during MR imaging or MR examination by means of an MR imaging apparatus. The instrument is made RF-safe by increasing the energy loss of an oscillator which is represented by the conductor (1, 3) by means of a damping element (4; 6) in order to prevent or limit RF heating of the examination object (A) at or surrounding the conductor (1, 3).
    • 公开了用于在检查对象(A)的MR成像或MR检查期间使用的RF安全介入或非介入性仪器,该仪器由或包括至少一个纵向或细长的导电元件(1,3) ),特别是用于馈送电信号的导体或线或线的形式,或以仪器本身或其部件或部分的形式,其不被提供用于馈送电信号但仍然导电,其中所有这些 当仪器或元件暴露于通过MR成像设备的MR成像或MR检查期间产生的RF / MR激励场时,元件受到在元件中感应的RF共模电流。 通过借助于阻尼元件(4; 6)增加由导体(1,3)表示的振荡器的能量损失,以便防止或限制检查对象的RF加热,使仪器成为RF安全的( A)在导体(1,3)处或周围。