@misc{indiciae30b3b2ace5b6,
  title = {Pulse-echo imaging using a nondiffracting beam transducer.},
  author = {J Y Lu and J F Greenleaf},
  year = {1991},
  doi = {10.1016/0301-5629(91)90048-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/1887512/},
  note = {Source identifier: 1887512}
}