Motion-sensitized driven equilibrium blood-suppression sequence for vessel wall imaging
US9448296B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2009 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Jun 21, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/563
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved motion-sensitization driven equilibrium (iMSDE) sequence based upon an MLEV-4 sequence is used for black-blood vessel wall imaging. The MSDE pulse pattern that is used us a preparation sequence for other procedures employed to acquire images has been modified to produce the iMSDE sequence by the addition of a second 180 degree refocusing pulse and two motion sensitization gradients. The iMSDE sequence thus includes a group of four radio frequency (RF) pulses, as well as additional magnetic gradient pulses that are not included in the conventional MSDE sequence. Computer simulations indicate that this new pulse sequence is substantially more immune to local B1 inhomogeneity than conventional sequences. In vivo experiments have demonstrated significant signal improvement at high first-order moments (m1) conditions compared to the traditional MSDE sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.