TY - JOUR
T1 - DOPPLER SPECTRUM PROBING OF FLOWS TRANSVERSE WITH RESPECT TO BEAM AXIS.
AU - Newhouse, V. L.
AU - Cisneros, J. A.
AU - Censor, D.
AU - Goldberg, B.
PY - 1985/1/1
Y1 - 1985/1/1
N2 - Theoretical analysis and experimental results are given for a Doppler method that facilitates the assessment of flow parameters, using a sound beam whose axis is perpendicular to the flow. The simplistic Doppler effect formula predicts zero frequency shifts for this geometry. However, the present configuration of a finite aperture and focused beam contains oblique rays which provide the detectable Doppler signals, in spite of the fact that the flow is transverse with respect to the axis. Using pulsed ultrasonic Doppler, with a transducer having a circular aperture, in-vitro flow measurements have been peformed, which compare well with results of classical techniques and are also in agreement with the present theoretical analysis.
AB - Theoretical analysis and experimental results are given for a Doppler method that facilitates the assessment of flow parameters, using a sound beam whose axis is perpendicular to the flow. The simplistic Doppler effect formula predicts zero frequency shifts for this geometry. However, the present configuration of a finite aperture and focused beam contains oblique rays which provide the detectable Doppler signals, in spite of the fact that the flow is transverse with respect to the axis. Using pulsed ultrasonic Doppler, with a transducer having a circular aperture, in-vitro flow measurements have been peformed, which compare well with results of classical techniques and are also in agreement with the present theoretical analysis.
UR - http://www.scopus.com/inward/record.url?scp=0022288565&partnerID=8YFLogxK
U2 - 10.1109/ultsym.1985.198658
DO - 10.1109/ultsym.1985.198658
M3 - Conference article
AN - SCOPUS:0022288565
SN - 0090-5607
SP - 971
EP - 974
JO - Ultrasonics Symposium Proceedings
JF - Ultrasonics Symposium Proceedings
ER -