The Doppler ultrasound system was designed and used to detect information on flow motion. The Doppler output spectrum of a moving target is achieved by utilizing the Doppler principle.
Most diagnostic ultrasound system is to separate moving target ec...
The Doppler ultrasound system was designed and used to detect information on flow motion. The Doppler output spectrum of a moving target is achieved by utilizing the Doppler principle.
Most diagnostic ultrasound system is to separate moving target echoes from relatively stationary target echoes.
When we observed a moving target using a suitably configured Doppler system, It is shown that for a single approaching target the output spectrum which Doppler system produces is time-dilated replica of the received echo signal. On the other hand, for a receding target the output is time inverted as well as dilated. Doppler output spectra for moving target are presented theoretically, the results are used to calculate an expression for the output spectra of a pulsed Doppler system, and confirmed experimentally.