  This is the technical report of the 9th place in the final result of
PARSE2022 Challenge. We solve the segmentation problem of the pulmonary artery
by using a two-stage method based on a 3D CNN network. The coarse model is used
to locate the ROI, and the fine model is used to refine the segmentation
result. In addition, in order to improve the segmentation performance, we adopt
multi-view and multi-window level method, at the same time we employ a
fine-tune strategy to mitigate the impact of inconsistent labeling.
