Conference paper
In Vivo Three-Dimensional Velocity Vector Imaging and Volumetric Flow Rate Measurements
Department of Electrical Engineering, Technical University of Denmark1
Biomedical Engineering, Department of Electrical Engineering, Technical University of Denmark2
Copenhagen University Hospital Herlev and Gentofte3
Center for Fast Ultrasound Imaging, Centers, Technical University of Denmark4
The three-dimensional (3-D) Transverse Oscillation (TO) method is used to obtain 3-D velocity vector estimates in two orthogonal planes. The method is suitable for a real-time implementation. Data are acquired using a Vermon 3.0 MHz 32x32 element 2-D phased array and the experimental ultrasound scanner SARUS.
Measurements are conducted on a carotid artery flow phantom from Danish Phantom Design, and 20 frames are acquired with a constant flow rate of 16.7±0.17 mL/s provided by a Shelley Medical Imaging Technologies CompuFlow 1000 system. The peak velocity magnitude in the vessel is found to be 52.3±8.1 m/s compared to an expected peak velocity of 53.6±0.54 cm/s.
Based on the out-of-plane velocity component in the crosssectional plane, the estimated volumetric flow rates are 17.1±1.4 mL/s. The coefficient of variation is 8.3%, and the bias is 2.2%. An in vivo measurement of 3-D M-mode velocities is conducted over five heart beats. The peak systolic and end-diastolic velocities are 69±5.4 cm/s and 7.9±5.5 cm/s at the center of the vessel.
For comparison, a commercial BK Medical ultrasound scanner using the spectral estimator yields 71.2 cm/s and 7.70 cm/s, respectively. The results demonstrate that the 3-D TO method can estimate 3-D velocities in two crossed planes, volumetric flow rates, and 3-D velocities in vivo.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2013 |
| Pages: | 72-75 |
| Proceedings: | 2013 IEEE International Ultrasonics Symposium |
| ISBN: | 1467356840 , 1467356859 , 1467356867 , 9781467356848 , 9781467356855 and 9781467356862 |
| ISSN: | 19485719 |
| Types: | Conference paper |
| DOI: | 10.1109/ULTSYM.2013.0019 |
| ORCIDs: | Stuart, Matthias Bo , Tomov, Borislav Gueorguiev and Jensen, Jørgen Arendt |
3D M-mode velocity measurement 3D transverse oscillation method 3D velocity vector estimates 3D velocity vector imaging measurement BK Medical ultrasound scanner Carotid arteries Danish Phantom Design Estimation Imaging In vivo Shelley Medical Imaging Technologies CompuFlow 1000 system Ultrasonic imaging Ultrasonic variables measurement Vectors Vermon 2D phased array blood flow measurement blood vessels carotid artery flow phantom cross-sectional plane crossed planes end-diastolic velocity flow visualisation frequency 3 MHz heart beats orthogonal planes out-of-plane velocity component peak systolic velocity peak velocity magnitude phantoms spectral estimator ultrasound scanner SARUS variation coefficient velocity measurement vessel center volumetric flow rate measurement
