Determination of Fetal Left Ventricular Volume Based on Two-Dimensional Echocardiography

Figure 5

Distances for the BP neural network input. O is the center of LV. p_i (i = 1, 2, …, 16) are the selected points on the border of LV with the equal angle. d_i (i = 1, 2, …, 16) are the corresponding distances between p_i and O.