Table 4. Interstudy variability.

	US	Bias	95% LOA
Radial velocity	FS	0.01	[-1.09,0.78]
	2x	-0.00	[-1.16,0.75]
	4x	-0.00	[-1.04,0.72]
	8x	-0.02	[-1.01,0.62]
	16x	-0.03	[-0.81,0.66]
Longitudinal velocity	FS	-0.00	[-1.06,1.33]
	2x	0.01	[-1.03,1.50]
	4x	0.04	[-1.12,1.43]
	8x	0.05	[-0.87,1.07]
	16x	0.06	[-0.70,0.87]
Circumferential strain	FS	-0.05	[-4.08,4.13]
	2x	-0.07	[-4.29,4.41]
	4x	-0.09	[-4.37,4.54]
	8x	-0.16	[-4.23,4.96]
	16x	-0.32	[-4.23,4.12]

The median and 95% percentile interval for the difference between two measurements on two consecutive days. Circumferential strain was calculated from temporal integration of the myocardial velocity field measured by TPM [5,20].

US = undersampling factor. LOA = limits of agreement.