Variability of perfusion dark rim artifacts due to Gibbs ringing

Abstract

Gibbs ringing is a well known source of Dark Rim Artifacts (DRA) in myocardial perfusion imaging. The visibility of Gibbs DRAs in perfusion studies is very dependent on the position of the subendocardial wall inside the pixel in the absence of zero-filled pre-FFT interpolation. Position variations from frame to frame in a typical gated perfusion study can explain some of the variability often seen in DRAs. Interpolation by zero-filling prior to enlarged FFT regularizes the DRA appearance.