Abstract #4479
Free Breathing Variable Flip Angle Balanced SSFP Cardiac Cine Imaging with Reduced SAR at 3T
Subashini Srinivasan 1,2 , Randall M Kroeker 3 , Adam Plotnik 1 , Simon Gabriel 1 , Nancy Halnon 4 , Peng Hu 1 , J. Paul Finn 1 , and Daniel B Ennis 1,2
1
Department of Radiological Sciences,
University of California, Los Angeles, California,
United States,
2
Department
of Bioengineering, University of California, Los
Angeles, California, United States,
3
Siemens
Healthcare, Malvern, Pennsylvania, United States,
4
Department
of Pediatrics, University of California, Los Angeles,
California, United States
Breath-hold, segmented, constant flip angle (BH-CFA)
bSSFP cardiac cine imaging can be challenging at 3T in
patients with poor breath holding capacity which results
in motion artifacts. Real-time, free-breathing imaging
with retrospective reconstruction can be SAR intensive,
which may limit image quality. The objective of this
study was to develop and evaluate a free breathing
variable FA (FB-VFA) cardiac cine imaging technique with
reduced SAR at 3T for improved comfort and compliance.
FB-VFA reduced the SAR by 25% compared to BH-CFA and
maintained blood-myocardium contrast and image quality
sufficient to perform global and regional cardiac
functional analysis.
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