@misc{indiciae4c5d024e8fa5,
  title = {Attenuation estimation with the zero-crossing technique: phantom studies.},
  author = {J Ophir and M A Ghouse and L A Ferrari},
  year = {1985},
  doi = {10.1177/016173468500700202},
  url = {https://pubmed.ncbi.nlm.nih.gov/3909600/},
  note = {Source identifier: 3909600}
}