Volumetric Blood Flow Assessment through Multigate Spectral Doppler

Summary, in English

Volumetric blood flow measurements require the assessment of both the velocity distribution and the cross-sectional area of the vessel. Unfortunately several difficulties hamper such a measurement in standard approaches. A new dual beam method has been recently introduced in which the Doppler spectral symmetry is exploited to finely orientating the first beam at 90° with respect to the flow, so that the remaining beam can perform a velocity measurement with known Doppler angle. In this paper it is shown how this special beam configuration proves particularly suitable for volume flow measurements. While the transverse beam performs a diameter measurement with optimal orientation, the velocity distribution along the second beam is measured through multigate spectral analysis. The method has been coded on a research system. In-vitro experiments produced a bias less then 7% with a coefficient of variability (CV) less then 5%. In preliminary tests on 3 volunteers CVs within 10% were obtained.

• Author: Stefano Ricci; Magnus Cinthio; Lorenzo Francalanci; Piero Tortoli
• Department/s: Department of Biomedical Engineering
• Publishing year: 2009
• Language: English
• Pages: 570-573
• Publication/Series: 2009 IEEE International Ultrasonics Symposium
• Links: http://dx.doi.org/10.1109/ULTSYM.2009.5442066
• Document type: Conference paper
• Publisher: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Topic: Medical Laboratory and Measurements Technologies
• Status: Published
• ISBN/ISSN/Other: ISBN: 978-1-4244-4389-5