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Pulsed Doppler accuracy assessment due to frequency-dependent attenuation and Rayleigh scattering error sources

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2 Author(s)
P. M. Embree ; Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA ; W. D. O'Brien

It is pointed out that frequency-dependent attenuation and Rayleigh scattering are significant error sources for pulsed Doppler ultrasound, used for human blood flow measurement, because the transmitted ultrasound signal has a finite width spectrum. The former causes a frequency downshift and the latter a frequency upshift, both of which are independent of the actual Doppler frequency shift. These error sources were evaluated through computer simulation, and the computed error is compared with experimental data.

Published in:

IEEE Transactions on Biomedical Engineering  (Volume:37 ,  Issue: 3 )