Surgery – Truss – Pad
Patent
1995-08-04
1997-04-01
Lateef, Marvin M.
Surgery
Truss
Pad
1286533, 12866109, 12866202, 128664, 128665, 356 27, 356 28, 356 285, 324306, 324309, A61B 5055
Patent
active
056156774
ABSTRACT:
A closed-form integration method is derived and analyzed for computing motion trajectories from velocity field data, in particular as measured by phase contrast cine (PC) MR imaging. By modeling periodic motion as composed of Fourier harmonics and integrating the material velocity of the tracked point in the frequency domain, this method gives an unbiased trajectory estimate in the presence of white measurement noise and eddy current effects. When applied to practical data, the method can incorporate compensation for the frequency response of the data acquisition method, offering a further improvement on the tracking accuracy. In simulation and phantom studies, the estimated trajectories were in excellent agreement with the true trajectories. Encouraging results have also been obtained on data from human beings.
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Pelc Norbert J.
Zhu Yudong
Lateef Marvin M.
Mantis Mercader Eleni
The Board of Trustees of the Leland Stanford Junior University
Woodward Henry K.
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