Ultrasonic diagnostic imaging typically employs a frequency range from

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URSC ISRO Technical Assistant Electronics 20 August 2017 Official Paper
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  1. 1 kHz to 15 kHz
  2. 1 MHz to 15 MHz
  3. 1 Hz to 100 Hz
  4. 1 GHz to 15 GHz

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Option 2 : 1 MHz to 15 MHz
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  • Ultrasound frequencies in a diagnostic range from 1 MHz to 18 MHz.
  • Higher frequencies have shorter wavelengths and are absorbed or attenuated more easily. Therefore the high-frequency signals are not that penetrating.
  • This explains why high frequency is used for the superficial body structures & low frequency is used for those that are deeper.
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