• Diagnostic qualities of echoencephalography (echo ranging) reveal abnormal brain structure like tumors & dilated ventricles.
  • The principle underlying is similar to that of SONAR & RADAR.
  • An ultrasonic equipment short bursts sound energy is formed into beam by transducer & directed into body.
  • The echo received indicates distance of reflecting tissues.
  • The reflections are displayed as peaks versus distance & show symmetry of brain structure.
  • Asymmetric peaks may indicate swellings in brain or tumors.