Ultrasonic B-scanning of the heart with an ECG gated television display.

@article{Hussey1973UltrasonicBO,
  title={Ultrasonic B-scanning of the heart with an ECG gated television display.},
  author={Mary Hussey and William N McDicken and Duncan A F Robertson},
  journal={Ultrasonics},
  year={1973},
  volume={11 2},
  pages={73-6}
}