On Doppler Ultrasonic Measurements of the Blood Flowing Through Vessels

Electronics and Communication, #21, 2004, pp.94-
100. Necessity to improve the quality of bloodflow volume measurements is conditioned by insufficient accuracy of contemporary approaches to testing, which require vessel cross-section stability, and this practically never happen. An opportunity to avoid this limitation is based on an idea to retrieve information about time variance of vessel cross-section area from curve of current average power of highpass filtered ultrasonic signal.