Evaluation of ultrasound Tissue Velocity Imaging: a phantom study of velocity estimation in skeletal muscle low-level contractions

Table 2 Mean difference and estimation error

Velocity peak value (cm/s)	PRF (kHz)	Mean difference ± SD (cm/s)	Mean error (%)
0.03	0.25	0.009 ± 0.006	31
	1.0	0.045 ± 0.006	149
	1.75	0.094 ± 0.007	313
0.17	0.25	0.034 ± 0.020	20
	1.0	0.032 ± 0.016	19
	1.75	0.029 ± 0.025	17
0.26	0.25	0.057 ± 0.036	22
0.26	1.0	0.064 ± 0.039	24
	1.75	0.057 ± 0.026	22

Table 2 show the mean differences and the standard deviation of the peak velocity values for the three sine wave motions together with the mean error (presented as the percentage of the true value).

ISSN: 1471-2342