Table 1.

Measurement of normal renal elasticity by shear wave elastography (SWE)

Position	Compartments	Left kidney (kPa, n = 16)	Right kidney (kPa, n = 16)	P value
Renal mid-portion	Cortex	15.78 ± 1.52**##	16.33 ± 1.44**##	0.382
	Medulla	13.16 ± 1.69*	13.55 ± 1.38*	0.561
	Sinus	11.70 ± 1.62	12.23 ± 1.42	0.432
Renal lower pole	Cortex	4.41 ± 0.36	4.50 ± 0.48	0.54

Values are given as the mean ± SD. Measurements were performed respectively with the ultrasound (US) beam along (axial, mid-portion) and perpendicular (transverse, lower pole) to the main axis of the pyramid. Using paired t-test or ANOVA analysis. Compared with sinus: ^*, P<0.05; ^**, P<0.01 Compared with medulla: ^##, P<0.01