| 摘要 |
Ultrasonographic display systems provide synchronization of the transducer scanning motion with the horizontal sweep of a cathode ray tube, so that horizontal displacement of the beam on the tube face is proportional to the corresponding displacement of transducer in its scanning motion. Deflection and intensity modulation of the tube beam are combined and preferably a novel expander circuit is provided for highlighting the echo signal of interest, making the system particularly suitable for medical diagnosis of tissue abnormalities.
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