TABLE 5.

Mean and standard deviation of the signal‐to‐noise ratio (SNR) and uniformity over the course of the first 150 days

Imaging sequence	SNR (μ ± σ)	Uniformity (μ ± σ) (%)
MS‐MESE	Echo 1: 69.3 ± 2.0	Echo 1: 38.6 ± 0.5
	Echo 2: 51.1 ± 1.5	Echo 2: 38.6 ± 0.6
MS‐FFE	59.3 ± 1.8	38.7 ± 0.6
2D‐MESE	Echo 1: 53.3 ± 2.2	Echo 1: 5.8 ± 0.3
	Echo 2: 46.1 ± 2.0	Echo 2: 6.3 ± 0.3
	Echo 3: 37.3 ± 1.9	Echo 3: 6.5 ± 0.4

Note: Tolerance levels for each sequence are given in Table 2.

Abbreviations: 2D‐MESE, two‐dimensional multi‐echo spin‐echo; MS‐FFE, multi‐slice fast field‐echo; MS‐MESE, multi‐slice multi‐echo spin‐echo.