Premium
Addressing efficiency and residual magnetization cross talk in multi‐slice 2D steady‐state free precession imaging of the heart
Author(s) -
Slavin Glenn S.,
Rettmann Dan W.
Publication year - 2005
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20410
Subject(s) - steady state free precession imaging , steady state (chemistry) , precession , wafer , residual , magnetization , imaging phantom , cardiac imaging , computer science , heartbeat , nuclear magnetic resonance , physics , magnetic resonance imaging , optics , algorithm , chemistry , magnetic field , medicine , condensed matter physics , optoelectronics , radiology , computer security , quantum mechanics
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. Magn Reson Med 53:965–969, 2005. © 2005 Wiley‐Liss, Inc.