Radial versus Cartesian Sampling for Physiological Stress CMR Perfusion: A Head-to-Head Comparison
Silvio Pflugi 1,2 , Sbastien Roujol 1 , Mehmet Akakaya 1 , Keigo Kawaji 1 , Murilo Foppa 1 , Bobby Heydari 3 , Beth Goddu 1 , Kraig V Kissinger 1 , Sophie Berg 1 , Warren J. Manning 1,4 , Sebastian Kozerke 2 , and Reza Nezafat 1
Department of Medicine, Beth Israel
Deaconess Medical Center / Harvard Medical School,
Boston, MA, United States,
for Biomedical Engineering, University and ETH Zurich,
of Medicine, Brigham and Women Hospital and Harvard
Medical School, Boston, MA, United States,
of Radiology, Beth Israel Deaconess Medical Center /
Harvard Medical School, Brookline, MA, United States
Physiologic stress CMR perfusion is challenging due to
the patients inability to breath-hold after exercise.
Perfusion imaging is commonly performed using Cartesian
sampling of k-space. Alternative sampling schemes, such
as radial or spiral, have demonstrated reduction of
dark-rim artifacts in the myocardium, which are commonly
observed in acquisitions with Cartesian sampling.
However, the comparison of Cartesian and non-Cartesian
CMR perfusion after physical exercise has not yet been
evaluated. In this study, we sought to compare Cartesian
sampling and radial sampling for accelerated perfusion
acquired after physiologic stress with an MR-compatible
supine bicycle ergometer.
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