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    • 2. 发明授权
    • Intracavity probe and interface device for MRI imaging and spectroscopy
    • 用于MRI成像和光谱学的腔内探针和界面装置
    • US5348010A
    • 1994-09-20
    • US949918
    • 1992-09-24
    • Mitchell D. SchnallRobert E. LenkinskiHerbert Y. KresselHoward M. PollackTheodore C. ClaiborneGeorge J. MisicThomas R. WelchEdward J. Rhinehart
    • Mitchell D. SchnallRobert E. LenkinskiHerbert Y. KresselHoward M. PollackTheodore C. ClaiborneGeorge J. MisicThomas R. WelchEdward J. Rhinehart
    • A61B5/055A61F2/958A61M25/095G01R33/34G01R33/36A61B5/55
    • G01R33/341A61B5/055A61B5/4381A61M25/1011G01R33/34084A61M2025/1013A61M25/1002G01R33/34007G01R33/3657
    • An insertable pickup probe and interface network for magnetic resonance imaging and spectroscopy. The pickup probe in the preferred embodiment is for use in imaging the male prostate and comprises an elongated shaft supporting a patient interface balloon at its distal end which contains a RF receiving coil. The interface balloon comprises an inflatabe inner balloon enclosed by a flexible outer balloon. The receiving coil is positioned between the inner and outer balloons and placed intimately adjacent the region of interest by inflating the inner balloon to expand outwardly against the outer balloon. In addition, a non-stretchable planar material is provided on the surface on the inner balloon adjacent the receiving coil for ensuring that the receiving coil is placed adjacent the region of interest. The inner balloon is inflated by an inflator cuff connected to the shaft and communicated to the inner balloon by a first lumen in the shaft. The receiving coil is electrically connected to an interconnecting cable which is connected to the proximal end of the shaft and communicated to the receiving coil by a second lumen in the shaft. An interface network is also provided which receives the interconnecting cable of the pickup probe and includes impedance matching means, tuning means, and decoupling means for interfacing the probe with a magnetic resonance imaging scanner. In addition, the interface includes an electronic circuit for automatically adjusting the control voltage of a varactor diode in a Pi network which comprises the tuning means.
    • 可插入的探头和用于磁共振成像和光谱学的接口网络。 优选实施例中的拾取探头用于成像男性前列腺,并且包括在其远端支撑患者接口球囊的细长轴,其包含RF接收线圈。 界面气囊包括由柔性外气囊包围的发泡内气囊。 接收线圈定位在内气囊和外气囊之间,通过使内气囊膨胀而相对于外球囊向外膨胀而紧密地邻近感兴趣区域。 此外,在邻近接收线圈的内球囊的表面上设置非伸缩平面材料,以确保接收线圈位于感兴趣区域附近。 内球囊被连接到轴的充气器套筒充气,并且通过轴中的第一内腔与内球囊相通。 接收线圈电连接到互连电缆,该互连电缆连接到轴的近端并通过轴中的第二内腔连接到接收线圈。 还提供接口网络,其接收拾取探针的互连电缆,并且包括阻抗匹配装置,调谐装置和用于将探针与磁共振成像扫描器对接的去耦装置。 此外,该接口包括用于在包括调谐装置的Pi网络中自动调节变容二极管的控制电压的电子电路。