@article{he2017unsupervised,
  title={Unsupervised boundary delineation of spinal neural foramina using a multi-feature and adaptive spectral segmentation},
  author={He, Xiaoxu and Zhang, Heye and Landis, Mark and Sharma, Manas and Warrington, James and Li, Shuo},
  journal={Medical Image Analysis},
  volume={36},
  pages={22--40},
  year={2017},
  publisher={Elsevier}
}