@misc{indiciaedb36d1d8a0b4,
  title = {An improved technique for x-ray image evaluation. The two dimensional modulation transfer function.},
  author = {J E Gray and M P Capp and F R Whitehead},
  doi = {10.1097/00004424-197407000-00006},
  url = {https://pubmed.ncbi.nlm.nih.gov/4850547/},
  note = {Source identifier: 4850547}
}