Faculty of Medicine, Department of Radiology, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan.
Department of Radiology, Diagnostic Imaging Center, Utazu Hospital, Utazu-cho, Kagawa, Japan.
Jpn J Radiol. 2020 Dec;38(12):1158-1168. doi: 10.1007/s11604-020-01024-1. Epub 2020 Jul 29.
The purpose of the present study was to analyze the left pulmonary artery (LPA) branching pattern of the interlobar portion using three-dimensional CT pulmonary angiography (3D-CTPA) and thin-section CT images, and to attempt to diagrammatize these patterns.
The study included 320 patients suspected of having lung cancer of the left upper/lower lobe who underwent CTPA. The number and origin of the LPA branches of the interlobar portion, A1 + 2c, A6, and lingular artery from pars interlobaris (PI), were identified meticulously using 3D-CTPA and thin-section images. We then diagrammatized the identified LPA branching patterns of the interlobar portion.
The diagrammatized LPA branching patterns of the interlobar portion were broadly classified into seven types in the order of bifurcation from proximal to distal. Type 1 was the most frequent (120/320, 37.5%). PI originated from the lower portion, that is, from A8 or the common trunk of A8 and A9 in 95 cases (29.7%). We could also precisely diagrammatize the LPA branching patterns of the interlobar portion into 85 types in all 320 patients.
3D-CTPA and thin-section images provided precise preoperative information regarding the LPA branching patterns of the interlobar portion.
本研究旨在通过三维 CT 肺动脉造影（3D-CTPA）和薄层 CT 图像分析叶间段左肺动脉（LPA）的分支模式，并尝试对这些模式进行图示化。
本研究纳入了 320 例疑似左上/下叶肺癌的患者，均行 CTPA 检查。通过 3D-CTPA 和薄层图像仔细识别叶间段 A1+2c、A6 和舌段动脉（来自叶间部 PI）的 LPA 分支数量和起源。然后，我们对识别出的叶间段 LPA 分支模式进行了图示化。
图示化的叶间段 LPA 分支模式从近端到远端的分叉顺序分为七类。1 型最为常见（120/320，37.5%）。95 例（29.7%）PI 起源于下段，即 A8 或 A8 和 A9 的共同干。在所有 320 例患者中，我们还可以精确地将叶间段 LPA 分支模式图示化为 85 种。
3D-CTPA 和薄层图像为叶间段 LPA 分支模式提供了精确的术前信息。
