@misc{indiciae9b5e0dc90208,
  title = {Hinged shutter for image alternator.},
  author = {P Stark and D C Smith},
  year = {1988},
  doi = {10.1148/radiology.167.2.3357974},
  url = {https://pubmed.ncbi.nlm.nih.gov/3357974/},
  note = {Source identifier: 3357974}
}