Title :
On improving the S/N ratio in color flow mapping
Author :
Oung, H. ; Schmidt, A.W. ; Pedersen, P.C. ; Reid, J.M.
Author_Institution :
Biomed. Eng. & Sci. Inst., Drexel Univ., Philadelphia, PA, USA
Abstract :
The authors show that when mechanical scanning used in color flow mapping is controlled using a stepper motor, the signal-to-noise (S/N) ratio is improved because the uncancelled signal due to the transducer scanning effect is reduced. As a result, color flow mapping may be extended to the imaging of small vessels and under weakly scattering, low-flow-rate conditions. Experimental results obtained using a Doppler phantom with a neoprene simulated vessel of 0.6-cm internal diameter are presented
Keywords :
biomedical measurement; biomedical ultrasonics; flow measurement; haemodynamics; 0.6 cm; Doppler phantom; S/N ratio; blood flow; color flow mapping; mechanical scanning; neoprene simulated vessel; signal-to-noise ratio; small vessels imaging; stepper motor; transducer scanning effect; uncancelled signal; weakly scattering low-flow-rate conditions; Biomedical imaging; Biomedical transducers; Blood flow; Breast tumors; Imaging phantoms; Medical diagnostic imaging; Phased arrays; Scattering; Silicon compounds; Ultrasonic imaging;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96282
