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Fig. 1A —Bar graphs show signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) for 3D fast spin-echo (FSE) extended echo-train acquisition (XETA) (light gray bars), 2D FSE (white bars), and 2D fast recovery FSE (FRFSE) (black bars). Asterisks denote significant differences (p < 0.01). Cartilage SNR for 3D FSE XETA (TR/TE_eff, 2,500/38), 2D FSE (TR/TE_eff, 4,000/38), and 2D FRFSE (TR/TE_eff, 2,500/38). Cartilage and muscle SNRs are significantly higher for 3D FSE XETA compared with 2D FSE and 2D FRFSE. Fluid SNR for 2D FSE is higher than 3D FSE XETA. Fluid SNRs for 2D FRFSE and 3D FSE XETA are not statistically different.

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