@inproceedings{zhang2003efficient,
  title={An efficient multiscale approach to level set evolution},
  author={Zhang, Hongmei and Bian, Zhengzhong and Guo, Youmin and Fei, Baowei and Ye, Min},
  booktitle={Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No. 03CH37439)},
  volume={1},
  pages={694--697},
  year={2003},
  organization={IEEE}
}