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Medical Term:


Pronunciation: rā′dē-o-frē′kwen-sē


  1. Radiant energy of a certain frequency range; radio and television employ radiant energy having a frequency between 105 and 1011 Hz, whereas diagnostic x-rays have a frequency in the range of 3 × 1018 Hz.
  2. In magnetic resonance imaging, the energy applied to switch or create a gradient in the magnetic field.