Inter-study reproducibility of arterial spin labelling magnetic resonance imaging for measurement of renal perfusion in healthy volunteers at 3 Tesla

Table 2 Kidney morphological, T1 and perfusion measurements made by ASL MRI

	ASL MRI 1		ASL MRI 2		p value
	Mean	SD	Mean	SD	p value
Kidney length (cm)	10.6	0.8	10.8	0.8	0.02
Kidney volume Ellipsoid formula (cm ³ )	120.5	26.1	126.4	24.9	0.02
Kidney volume voxel count (cm ³ )	155.7	29.2	157.7	28.6	0.39
Whole kidney T1 (ms)	1491	61	1499	52	0.52
Cortical T1 (ms)	1376	104	1406	96	0.07
Medullary T1 (ms)	1651	86	1639	80	0.38
Whole kidney perfusion (ml/min/100 g)	228	40	230	41	0.66
Cortical perfusion (ml/min/100 g)	321	63	334	63	0.18
Absolute perfusion (ml/min)	367	66	379	86	0.33

ISSN: 1471-2369