Surgery – Truss – Pad
Patent
1992-09-24
1994-09-20
Smith, Ruth S.
Surgery
Truss
Pad
1286535, A61B 555
Patent
active
053480104
ABSTRACT:
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.
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Claiborne Theodore C.
Kressel Herbert Y.
Lenkinski Robert E.
Misic George J.
Pollack Howard M.
Medrea, Inc., Pennsylvania Corp., Pa.
Smith Ruth S.
Trustees of the University of Pennsylvania, Not-For-Profit Penns
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