3-D velocity estimation for two planes in vivo

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3-D velocity vectors can provide additional flow information applicable for diagnosing cardiovascular diseases e.g. by estimating the out-of-plane velocity component. A 3-D version of the Transverse Oscillation (TO) method has previously been used to obtain this information in a carotid flow phantom with constant flow. This paper presents the first in vivo measurements of the 3-D velocity vector, which were obtained over 3 cardiac cycles in the common carotid artery of a 32-year-old healthy male volunteer. Data were acquired using a Vermon 3.5 MHz 32×32 element 2-D phased array transducer and stored on the experimental scanner SARUS. The full 3-D velocity profile can be created and examined at peak-systole and end-diastole without ECG gating in two planes. Maximum out-of-plane velocities for the three peak-systoles and end-diastoles were 68.5-5.1 cm/s and 26.3-3.3 cm/s, respectively. In the longitudinal plane, average maximum peak velocity in flow direction was 65.2-14.0 cm/s at peak-systole and 33.6-4.3 cm/s at end-diastole. A commercial BK Medical ProFocus UltraView scanner using a spectral estimator gave 79.3 cm/s and 14.6 cm/s for the same volunteer. This demonstrates that real-time 3-D vector velocity imaging without ECG gating yields quantitative in vivo estimations on flow direction and magnitude.

Original languageEnglish
Title of host publicationIEEE International Ultrasonics Symposium, IUS
Number of pages4
PublisherIEEE Computer Society Press
Publication date20 Oct 2014
Article number6931926
ISBN (Electronic)9781479970490
Publication statusPublished - 20 Oct 2014
Event2014 IEEE International Ultrasonics Symposium, IUS 2014 - Chicago, United States
Duration: 3 Sep 20146 Sep 2014


Conference2014 IEEE International Ultrasonics Symposium, IUS 2014
LandUnited States
SeriesIEEE International Ultrasonics Symposium, IUS

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