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Fig. 5 | Journal of Cardiovascular Magnetic Resonance

Fig. 5

From: The impact of signal-to-noise ratio, diffusion-weighted directions and image resolution in cardiac diffusion tensor imaging – insights from the ex-vivo rat heart

Fig. 5

Precision of parameters with varying ND and SNRnon-DW. The eigenvalues, MD, and FA are reported in % error relative to the ground truth, and the parametric angles are reported in degrees. Lines of equal scan time are shown in grey, and are spaced one order of magnitude apart. The precision of the ADC is better, and the precision of the FA is worse, than any of the eigenvalues individually. HA has better precision than TA, which is in turn better than the SE or SA. The E2A has better precision than the SE or SA, primarily as a result of evaluating only the magnitude. For a given scan time, the precision of the eigenvalues and ADC are optimised by maximising SNRnon-DW at the expense of ND. The precision of the FA and parametric angles are largely independent the SNR/ND trade-off. The contour lines represent the error compared to the ground-truth data in (%) for MD, FA and eigenvalues, and in (°) for angle maps

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