The paper information is below:

“Hierarchical Lung Field Segmentation with Joint Shape and Appearance Sparse Learning”, accepted for IEEE Trans. On Medical Imaging, 2014. [Yeqin Shao, Yaozong Gao, Yanrong Guo, Yonghong Shi, Xin Yang, Dinggang Shen]

BTW, Yaozong is the co-first author for this paper as well.