Flow adaptive guided determination of imaging parameters for 3D magnetic resonance angiography
US6618609B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2001 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | May 25, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/563
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To image flowing materials, magnetic resonance preconditioning pulses are applied in an upstream region (28). For scanning a subject, an RF pulse calibration sequence is performed by generating a corresponding magnetic resonance data line (361, . . . , 36n) in each of a plurality of slices (401, . . . , 40n) along a vessel. A processor (54) determines a signal intensity for each slice (56), fits the intensities for the family of slices to a curve (58), and adjusts an RF pulse profile with spatial position in accordance with the curve which is dynamically dependent on the scanned subject. In a subsequent imaging sequence with the adjusted tip angles, data lines from each of the slices are received (52) and reconstructed (62) into an image representation stored in the memory (64).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.