Method for obtaining coronary fractional flow reserve and computer equipment

The invention relates to a method for obtaining coronary fractional flow reserve and computer equipment, and the method comprises the steps: obtaining a DSA image sequence, screening, classifying and carrying out semantic segmentation, and obtaining a first angiography angle diagram and a second angiography angle diagram of a target blood vessel; reconstructing to obtain a three-dimensional center line and a three-dimensional contour of the target blood vessel, and obtaining an equivalent three-dimensional diameter; fitting the equivalent three-dimensional diameter to obtain a reference diameter; obtaining a first time difference of the contrast agent from the starting point participating in reconstruction of the three-dimensional center line to the end point in the first contrast angle graph, and obtaining a second time difference of the contrast agent from the starting point participating in reconstruction of the three-dimensional center line to the end point in the second contrast angle graph, the blood fl