Table 3.

Estimated flow obtained from calculation of Figure 5.

	Estimated flow	Area under curve	Thresholding (%)
A	76.40	262.43	13.64
B	38.20	524.86	27.27
C	84.73	523.18	25.82
D	42.36	1046.36	51.64
E	168.91	262.43	12.95

Note: the signal-to-noise ratio is 27.7 for A.