MRI tracking of cyclical motion by fourier integration of velocity
US5615677A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1995 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Aug 4, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/56316
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.