US 12,493,956 B2
Method and system of calculating the cross-section area and included angle of three-dimensional blood vessel branch
Jingqi Mao, Sichuan (CN); Zhao Wang, Sichuan (CN); Xi Chen, Sichuan (CN); and Nan Huang, Sichuan (CN)
Assigned to Chengdu Panovision Technology Co., LTD., Sichuan (CN)
Filed by Chengdu Panovision Technology Co., LTD., Sichuan (CN)
Filed on May 10, 2023, as Appl. No. 18/195,796.
Prior Publication US 2024/0070855 A1, Feb. 29, 2024
Int. Cl. G06T 7/00 (2017.01); G06T 7/62 (2017.01); G06T 19/20 (2011.01); G06V 10/44 (2022.01); G06V 10/46 (2022.01)
CPC G06T 7/0012 (2013.01) [G06T 7/62 (2017.01); G06T 19/20 (2013.01); G06V 10/44 (2022.01); G06V 10/46 (2022.01); G06T 2207/10101 (2013.01); G06T 2207/10132 (2013.01); G06T 2207/20084 (2013.01); G06T 2207/30101 (2013.01); G06T 2219/2016 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of calculating a cross-section area and an included angle of a three-dimensional blood vessel branch, comprising steps of:
S1, automatically detecting contours of a main blood vessel and a branch blood vessel according to intravascular imaging data, and determining the connecting points of the main blood vessel and the branch blood vessel;
S2, determining a three-dimensional branch outer contour and an initial normal vector of a branch section;
S3, translating the branch section to a branch connecting part, and determining a position thereof at the branch connecting part and an intersecting cross-section of the branch section and the branch outer contour;
S4, rotating a three-dimensional branch cross-section contour to obtain an equivalent two-dimensional branch cross-section contour, and calculating the area of the two-dimensional branch cross-section contour;
S5, rotating the normal vector of the branch section, and repeating steps S3 and S4, to obtain a series of branch cross-section areas and normal vectors corresponding thereto; and
S6, selecting the minimum branch cross-section area sMin of all the branch cross sections as the cross-section area of this segment of branch blood vessel, and regarding an included angle β between a normal vector corresponding to the minimum branch cross-section area and z axis as an included angle between the branch blood vessel and the main blood vessel.