PHY01 Basics of Ultrasound Echography

Basics of Ultrasound Echography Investigation of a specimen with enclosed defects using the pulse-echo method A specimen with enclosed defects is examined using the pulse-echo method. Amplitude scans are performed from different sides of the body. The echo signals depicted in the recorded A-scans are examined and analyzed. Keywords: propagation of ultrasonic waves, sound propagation time, sound velocity, sound characteristic impedance, reflection and transmission, pulse-echo method, ultrasonic A-scan The pulse-echo method forms the basis of numerous imaging methods in non-invasive medical diagnostics or non-destructive material testing. In the method, an ultrasound probe converts electrical impulses into mechanical vibrations. These are coupled into the body to be examined and pass through it as sound waves. Waves reflected by disturbances run back to the probe and are converted back into an electrical signal. The temporal recording of the amplitude of this signal (amplitude scan) is g