Surgery – Truss – Pad
Patent
1995-06-02
1998-01-13
Kamm, William E.
Surgery
Truss
Pad
128736, A61B 5055
Patent
active
057068100
ABSTRACT:
Methods and apparatus for magnetic resonance imaging (MRI) assisted cryosurgery. Optimal probe placements and cooling parameters are calculated prior to cryosurgery using MRI data. A MRI compatible cryoprobe and a stereotactic probe positioning device are provided. The resolution of MR images is enhanced by mounting a radio frequency MR coil on the intracorporeal end of a cryoprobe. During cryosurgery the temperature distribution in the frozen region is solved by determining the boundary of the frozen region and solving the heat equation for the known boundary conditions. During cryosurgery the temperature distribution in the unfrozen region is determined by T1 measurements. The process of freezing is controlled using information from the solution of the energy equation in the frozen region and temperature measurements in the unfrozen region. After cryosurgery the extent of the tissue damage may be ascertained using phosphorus-31 and/or sodium-23 spectroscopy with a special coil set on the cryosurgical probe.
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Gilbert John
Pease Grant
Roos Mark
Rubinsky Boris
Wong San
Evanisko George R.
Kamm William E.
The Regents of the University of California
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