Real time high spatial-temporal resolution flow imaging with spiral mri using auto-calibrated SENSE

Reza Nezafat, Peter Kellman, John A. Derbyshire, Elliot R. McVeigh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A novel spiral phase contrast technique was developed for high temporal and spatial resolution imaging of blood flow without cardiac gating. Spiral sampling of k-space has excellent flow properties and acquisition speed. Parallel imaging using the coil sensitivity maps can be used to reduce the imaging duration at the cost of SNR. An auto-calibrated spiral sensitivity encoding method is introduced and used for reconstruction of phase contrast images. Phase estimation for a simulated phantom using data from various acceleration rates was compared to the true phase map. To study the accuracy of the flow estimate with parallel image reconstruction, a high resolution cardiac gated experiment was performed and a subset of under-sampled data were reconstructed. The real-time experiments were performed to measure blood velocity in the ascending aorta and through the aortic valve with high spatial and temporal resolution. Temporal resolution of the flow images was improved by a factor of at least three with no cardiac gating signal with preserved spatial resolution. The results demonstrate the potential of using the technique for real-time flow imaging with improved spatial and temporal resolution.

Original languageEnglish (US)
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Pages1914-1917
Number of pages4
Volume26 III
StatePublished - 2004
EventConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 - San Francisco, CA, United States
Duration: Sep 1 2004Sep 5 2004

Other

OtherConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004
CountryUnited States
CitySan Francisco, CA
Period9/1/049/5/04

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Keywords

  • Phase contrast
  • Real-time mri
  • SENSE
  • Spiral

ASJC Scopus subject areas

  • Bioengineering

Cite this

Nezafat, R., Kellman, P., Derbyshire, J. A., & McVeigh, E. R. (2004). Real time high spatial-temporal resolution flow imaging with spiral mri using auto-calibrated SENSE. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (Vol. 26 III, pp. 1914-1917)