Partitioning the lung field based on the depth ratio in three-dimensional space

Jingjing Huang, Chengyu Bian, Wenhao Zhang, Guang Mu, Zhipeng Chen, Yang Xia, Mei Yuan, Hideki Ujiie, Jean H. T. Daemen, Erik R. de Loos, Quan Zhu, Weibing Wu, Liang Chen, Jun Wang