Method of removing dynamic nonlinear phase errors from MRI data
US6853191B1 · kind B1 · utility
26Cited by
4References
12Claims
0Family size
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Key dates
| Filing date | Dec 10, 2003 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | Dec 10, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/5676
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a generalized reconstruction method that corrects for non-linear phase errors based on least-squares estimation. An approximation of the least squares estimate utilizes refocusing reconstruction in which high-resolution data is multiplied by the phase conjugate of a navigator in image-space. The multiplication rephases the unaliased signal in the high-resolution data. The high-resolution data can then be added together coherently. The multiplication can be effected in k-space as a convolution using a gridding reconstruction of the high-resolution data using the low resolution navigator.
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