The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Associate Professor Magnus Cinthio, MSc, PhD. Photo.

Magnus Cinthio

Senior lecturer

Associate Professor Magnus Cinthio, MSc, PhD. Photo.

Accuracy and reproducibility of a novel dynamic volume flow measurement method.

Author

  • Stefano Ricci
  • Magnus Cinthio
  • Åsa Rydén Ahlgren
  • Piero Tortoli

Summary, in English

In clinical practice, blood volume flow (BVF) is typically calculated assuming a perfect parabolic and axisymmetric velocity distribution. This simple approach cannot account for the complex flow configurations that are produced by vessel curvatures, pulsatility and diameter changes and, therefore, results in a poor estimation. Application of the Womersley model allows compensation for the flow distortion caused by pulsatility and, with some adjustment, the effects of slight curvatures, but several problems remain unanswered. Two-and three-dimensional approaches can acquire the actual velocity field over the whole vessel section, but are typically affected by a limited temporal resolution. The multigate technique allows acquisition of the actual velocity profile over a line intersecting the vessel lumen and, when coupled with a suitable wall-tracking method, can offer the ideal trade-off among attainable accuracy, temporal resolution and required calculation power. In this article, we describe a BVF measurement method based on the multigate spectral Doppler and a B-mode edge detector algorithm for wall-position tracking. The method has been extensively tested on the research platform ULA-OP, with more than 1700 phantom measurements at flow rates between 60 and 750 mL/min, steering angles between 10 degrees and 22 degrees and constant, sinusoidal or pulsed flow trends. In the averaged BVF measurement, we found an underestimation of about-5% and a coefficient of variability (CV) less than 6%. In instantaneous measurements (e.g., systolic peak) the CV was in the range 2%-8.5%. These results were confirmed by a preliminary test on the common carotid artery of 10 volunteers (CV = 2%-11%). (E-mail: stefano [dot] ricci [at] unifi [dot] it) (C) 2013 World Federation for Ultrasound in Medicine & Biology.

Department/s

  • Division for Biomedical Engineering
  • Clinical Physiology and Nuclear Medicine, Malmö

Publishing year

2013

Language

English

Pages

1903-1914

Publication/Series

Ultrasound in Medicine and Biology

Volume

39

Issue

10

Document type

Journal article

Publisher

Elsevier

Topic

  • Radiology, Nuclear Medicine and Medical Imaging

Keywords

  • Blood volume flow
  • Quantitative flow assessment
  • Diameter measurement
  • Multigate spectral Doppler

Status

Published

Research group

  • Clinical Physiology and Nuclear Medicine, Malmö

ISBN/ISSN/Other

  • ISSN: 0301-5629