@misc{indiciae5e92cda012cc,
  title = {Improved needle-tip visualization by color Doppler sonography.},
  author = {U M Hamper and B L Savader and S Sheth},
  year = {1991},
  doi = {10.2214/ajr.156.2.1898823},
  url = {https://pubmed.ncbi.nlm.nih.gov/1898823/},
  note = {Source identifier: 1898823}
}