Table 2.

TSNR, #Outlier CBF volumes/subject, GM–WM contrast ratio and global CBF for the control and MCI cohort

		2D PASL	2D PCASL	BS 3D PCASL
TSNR (mean ± SD)	Control	2.28 ± 0.96	2.83 ± 1.56	6.44 ± 2.12
	MCI	1.74 ± 0.70	2.05 ± 1.23	5.54 ± 2.14
	Total	2.00 ± 0.87	2.42 ± 1.44	5.97 ± 2.15
#Outliers/subject (mean ± SD (range))	Control	1.05 ± 1.29 (0–4)	0.68 ± 0.72(0–2)	0.14 ± 0.47(0–2)
	MCI	1.83 ± 1.66 (0–6)	1.29 ± 1.12(0–4)	0.67 ± 1.01(0–4)
	Total	1.46 ± 1.53 (0–6)	1.00 ± 0.99 (0–4)	0.41 ± 0.83 (0–4)
GM–WM contrast ratio (mean ± SD)	Control	2.42 ± 0.72	2.29 ± 0.48	1.39 ± 0.13
	MCI	2.41 ± 0.57	2.31 ± 0.46	1.32 ± 0.13
	Total	2.41 ± 0.64	2.30 ± 0.46	1.35 ± 0.14
Global CBF (mean ± SD)	Control	36.51 ± 9.25	38.41 ± 8.77	39.69 ± 11.07
	MCI	34.83 ± 7.62	33.28 ± 7.69	35.68 ± 10.32
	Total	35.63 ± 8.39	35.73 ± 8.53	37.60 ± 10.76

TSNR, temporal signal‐to‐noise ratio; GM, grey matter; WM, white matter; CBF, cerebral blood flow; MCI, mild cognitive impairment.