Abstract #3632
A Self-Calibrated Through-time radial GRAPPA Method
Ozan Sayin 1 , Haris Saybasili 2 , M. Muz Zviman 3 , Mark Griswold 4,5 , Nicole Seiberlich 5 , and Daniel A. Herzka 1
1
Department of Biomedical Engineering, Johns
Hopkins University School of Medicine, Baltimore, MD,
United States,
2
Siemens
Healthcare USA, Inc., Chicago, IL, United States,
3
Department
of Medicine, Cardiology, Johns Hopkins University School
of Medicine, Baltimore, MD, United States,
4
Department
of Radiology, Case Western Reserve University,
Cleveland, OH, United States,
5
Department
of Biomedical Engineering, Case Western Reserve
University, Cleveland, OH, United States
Recently, a well-established parallel imaging technique
GRAPPA, has been successfully extended to radial imaging
via an improved calibration scheme that extends the
calibration to the time dimension (through-time radial
GRAPPA calibration), and has demonstrated high
acceleration factors in real-time imaging. The current
study aims to eliminate calibration scans while
preserving image quality. A novel self-calibration
method is proposed and validated in real-time cardiac
imaging in swine and normal subjects. Parameters related
to self-calibration are explored for optimal image
reconstruction of high acceleration rates (R=9-12).
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