Image contrast using high frequency and half-wave rectified dental x-ray generators.

@article{Helmrot1988ImageCU,
  title={Image contrast using high frequency and half-wave rectified dental x-ray generators.},
  author={Ebba Helmrot and Georg Matscheko and Gudrun Alm Carlsson and O. Eckerdal and S. C. Ericson},
  journal={Dento maxillo facial radiology},
  year={1988},
  volume={17 1},
  pages={33-40}
}