Investigation of transit time broadening in pulsed-wave Doppler ultrasound.
Published: 2004
Language: eng
Number of pages: 67
Description: An in-depth investigation of transit time broadening, which is a major source of error in pulsed-wave (PW) Doppler ultrasound, was performed. Mathematical relationships were derived to evaluate transit time broadening and its effects on the accuracy of PW Doppler ultrasound measurements for different single-scatterer flow paths through the sample volume. Methods for correcting the measurement errors caused by transit time broadening were also discussed. The presented theories were verified using a PW Doppler ultrasound simulation model. From this study, two significant findings with regards to transit time broadening in PW Doppler ultrasound were revealed. Firstly, there exists a transition beam-to-flow angle at which a significant change in the governing parameters of transit time broadening occurs. Secondly, if the flow path through the sample volume is off-centered, then skewing would appear in the transit time broadening bandwidth and higher degrees of measurement errors may be expected.
Notes: Adviser: Richard S. C. Cobbold.

Thesis (M.A.Sc.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Masters Abstracts International, Volume: 42-06, page: 2263.

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