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    STUDIA PHYSICA - Issue no. SPECIAL ISSUE / 2001  
         
  Article:   ULTRASOUND PROPAGATION THROUGH BIOLOGICAL TISSUES.

Authors:  FERRIDE SEVERCAN, DANA DOROHOI, DORINA CREANGĂ.
 
       
         
  Abstract:  Important information about anatomic functionality of biological tissues, as well as the presence of the tumors or of the foreign bodies can be obtained using physical parameters characterizing the ultrasound propagation in the tissues. The velocity and the absorption coefficient of ultrasound in biological tissues were measured using a pulse method. The pulse generator had a frequency of 103 Hz and the high frequency generator had a variable frequency in the range (1-4) MHz. Ceramic plates were used as generator and receiver of the ultrasounds. The measured parameters were used to estimate the adiabatic compressibility and the internal pressure in the studied tissues.  
         
     
         
         
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