Magnetic resonance method
US6694166B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2002 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Oct 1, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/56333
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic resonance method is described for forming a fast dynamic image with an automatically generated grid of essentially orthogonally arranged grid lines by a saturation information induced over the object to be imaged. Therefore a first set of parallel saturation planes is obtained by applying a first nonselective RF pulse with a flip angle of 90°, an intermediate magnetic field gradient pulse in direction of the spatial modulation, and a second nonselective RF pulse with a flip angle of 90°. A subsequent spoiler gradient pulse is applied in the direction of the magnetic field gradient for slice selection. Subsequently a second set of parallel saturation planes is obtained in the same manner by inverting one second RF pulse with respect to the first RF pulse. Further the first and the sets of saturation planes are subtracted from each other to obtain a grid free of any contribution of relaxation components of magnetization. A tagging grid in three dimensions is provided by obtaining sets of parallel saturation planes in all three spatial directions, whereas the strengths of the spoiler gradient pulses in the three dimensions are different to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.