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Text File  |  1992-09-02  |  332b  |  9 lines
  1. 1910-1987. English obstetrician who
  2. introduced ultrasound (very high-frequency
  3. sound waves) scanning. He pioneered its use
  4. in obstetrics as a means of scanning the
  5. growing fetus without exposure to the danger
  6. of X-rays. Donald's experience of using radar
  7. in World War II suggested to him the use of
  8. ultrasound for medical purposes.
  9.