A quantitative method for distinguishing complex
from non-complex flow patterns in ultrasound is presented.
A new commercial BK Medical ultrasound scanner uses the
Transverse Oscillation vector flow technique for visualising flow
patterns in real-time. In vivo vector flow data of the blood
flow patterns of the common carotid artery and the carotid
bulb were obtained simultaneously as the basis for quantifying
complex flow. The carotid bifurcation of two healthy volunteers
were scanned. The presence of complex flow patterns from
eight cardiac cycles were evaluated by three experts in medical
ultrasound. From the same data the mean standard deviation
of the flow angles (MSTDA) were calculated and compared
to the expert evaluations. Comparison between the combined
experts evaluations and the MSTDA was performed. Using linear
regression analysis, a correlation coefficient of 0.925 was found.
The upper and lower bounds for a 95% confidence interval of
0.974 and 0.792 respectively, were calculated. The MSTDA was
below 25 for the common carotid artery and above 25 for the
carotid bulb. Thus, the MSTDA value can distinguishing complex
flow from non-complex flow and can be used as the basis for
automatic detection of complex flow patterns.
|Title of host publication||Proceedings of IEEE International Ultrasonics Symposium|
|Conference||2010 IEEE International Ultrasonics Symposium|
|City||San Diego, California|
|Period||11/10/10 → 14/10/10|
Copyright 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.