Addressing efficiency and residual magnetization cross talk in multi-slice 2D steady-state free precession imaging of the heart

Glenn S. Slavin, Dan W. Rettmann

Research output: Contribution to journalArticlepeer-review

Abstract

This work presents an efficient method for achieving steady state in multi-slice 2D balanced steady-state free precession (SSFP) imaging of cardiac function. With current techniques, data acquisition for each slice is preceded by one or two heartbeats of dummy excitations. Depending on the number of heartbeats required for data acquisition, these dummy heartbeats can represent a large fraction of the total imaging time. As described here, FIESTA-SP (FIESTA with steady-state preparation) increases the imaging efficiency to nearly 100% by eliminating dummy heartbeats. Steady state for each slice is achieved using a linear flip angle series of excitations during the first cardiac phase of the first heartbeat for each slice. Because imaging proceeds immediately from one slice to the next, a heretofore-unseen issue arises where residual magnetization from each slice contaminates subsequent acquisitions. Accelerating the approach to steady state for each slice and eliminating slice cross talk are important for both multi-slice and interactive real-time imaging.

Original languageEnglish (US)
Pages (from-to)965-969
Number of pages5
JournalMagnetic resonance in medicine
Volume53
Issue number4
DOIs
StatePublished - Apr 2005

Keywords

  • Cardiac imaging
  • Multi-slice imaging
  • Rapid imaging
  • SSFP

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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