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- W1785639709 abstract "Background We demonstrate that projection imaging significantly reduces the prevalence and spatial extent of subendocardial dark-rim artifacts (DRAs) in first-pass perfusion (FPP) myocardial MR, compared to conventional Cartesian techniques. A major cause of DRAs, which remain a major concern in FPP imaging, is known to be the socalled Gibbs ringing (truncation) phenomenon [1-3]. Radial k-space sampling exhibits minimal Gibbs effects with typical FPP parameters, thereby eliminating a major contributing factor to DRAs [4]. The underlying theory is demonstrated in Fig. 1, which describes Cartesian and radial k-space sampling (with the same number of readouts) and the corresponding point spread functions (PSFs). Insufficient coverage along phase-encode direction with Cartesian sampling results in significant ringing in image domain (Fig. 1b). In contrast, angular undersampling results in streaks outside of a “local” region for" @default.
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- W1785639709 date "2013-01-01" @default.
- W1785639709 modified "2023-10-16" @default.
- W1785639709 title "Eliminating dark-rim artifacts in first-pass myocardial perfusion imaging" @default.
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- W1785639709 doi "https://doi.org/10.1186/1532-429x-15-s1-o3" @default.
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