Three-dimensional reconstruction method of ultrasound image and system thereof

The invention provides a three-dimensional reconstruction method of an ultrasound image, which comprises the following steps: projection: determining an initial position of light, a sampling initial point and coordinates of a sampling point, and giving initial values of a gray value and an opacity value; table look-up: judging whether the current sampling point meets a synthesis condition according to the gray value of the current sampling point, and obtaining the opacity and the color value of the current sampling point by looking up tables for the sampling point which meets the synthesis condition; and synthesis: for the sampling point which meets the synthesis condition, calculating the distance from the current sampling point to the initial point of the projection light and the distance from an end point to a start point of the projection light, calculating the cumulative gray scale and the cumulative opacity according to the distance, and carrying out combination calculation according to the opacity and