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Table 3 Image quality assessment of images produced from iterative reconstruction of SMS images with different parameters, for 8 patients (see Table 1 for definition of rating scales). λσ indicates the degree of spatial regularisation, whilst λτ indicates the extent of temporal regularisation. SMS-iter 6 (λσ 0.001 λτ 0.005) had the highest overall image quality and the lowest amount of sequence related artifact. Results are mean ± standard deviation. Contrast ratio calculated as the ratio peak blood pool signal intensity: peak myocardial signal intensity

From: Simultaneous multi slice (SMS) balanced steady state free precession first-pass myocardial perfusion cardiovascular magnetic resonance with iterative reconstruction at 1.5 T

Iterative reconstruction parameters Overall Image Quality Perceived SNR Sequence Related Artifact Patient Related Artifact Contrast Ratio
SMS-iter 1 (λσ 0.0005 λτ 0.0005) 1.63 ± 0.74 1.63 ± 0.52 0.69 ± 1.10 0.89 ± 1.36 3.64 ± 0.37
SMS-iter 2 (λσ 0.001 λτ 0.001) 1.88 ± 0.35 1.63 ± 0.52 0.31 ± 0.59 0.89 ± 1.36 3.73 ± 0.44
SMS-iter 3 (λσ 0.0025 λτ 0.0025) 1.50 ± 0.53 2.00 ± 0.00 0.63 ± 1.27 1.00 ± 1.41 3.80 ± 0.47
SMS-iter 4 (λσ 0.005 λτ 0.005) 1.25 ± 0.46 1.88 ± 0.35 1.88 ± 1.62 1.00 ± 1.41 3.93 ± 0.51
SMS-iter 5 (λσ 0.001 λτ 0.0025) 2.13 ± 0.35 2.13 ± 0.35 0.25 ± 0.38 0.78 ± 1.40 3.63 ± 0.40
SMS-iter 6 (λσ 0.001 λτ 0.005) 2.50 ± 0.53 2.25 ± 0.46 0.13 ± 0.35 0.56 ± 1.01 3.62 ± 0.39
SMS-iter 7 (λσ 0.001 λτ 0.01) 2.00 ± 0.53 2.25 ± 0.46 0.56 ± 0.86 0.67 ± 1.32 3.64 ± 0.40