Anatomical type analysis of right interlobar artery based on chest thin-slice CT scan and three-dimensional reconstruction

Purpose: To analysize and summarize branching patterns types of the interlobar portion of right pulmonary arteries (RPA) through chest thin-slice CT scan and three-dimensional reconstruction. Methods: A total of 179 patients (58 males and 121 females, with an average age of 53.9 years) were retrospectively included from December 2020 to December 2021 in the Thoracic Surgery Department of Ningbo First Hospital. All patients completed preoperative thin-slice CT scan and three-dimensional reconstruction of the chest. The clinical data and branching patterns were collected. Data were analyzed using SPSS 21.0. Results: The branching patterns types of the interlobar portion of RPA were divided into 4 types according to the order and number of branches: Type I (145/179, 81.0%), Asc.A2, MA, A6; Type II (28/179, 15.6%) , Asc.A2 deletion, MA, A6; Type III (5/179, 2.8%), Asc.A2, A6, MA; Type IV (1/179, 0.6%), MA, Asc.A2, A6; I type is the most common. Further, according to the number of branches of MA and A6, it can be subdivided into 15 sub-categories. Conclusion: Chest thin-slice CT scan and 3D reconstruction can provide surgeons accurate lung anatomy, which helps surgeons make preoperative planning, and complete surgery successfully.