Conference paper
High frame rate synthetic aperture vector flow imaging for transthoracic echocardiography
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
This work presents the first in vivo results of 2-D high frame rate vector velocity imaging for transthoracic cardiac imaging. Measurements are made on a healthy volunteer using the SARUS experimental ultrasound scanner connected to an intercostal phased-array probe. Two parasternal long-axis view (PLAX) are obtained, one centred at the aortic valve and another centred at the left ventricle.
The acquisition sequence was composed of 3 diverging waves for high frame rate synthetic aperture flow imaging. For verification a phantom measurement is performed on a transverse straight 5 mm diameter vessel at a depth of 100 mm in a tissue-mimicking phantom. A flow pump produced a 2 ml/s constant flow with a peak velocity of 0.2 m/s.
The average estimated flow anglein the ROI was 86.22◦ ± 6.66◦ with a true flow angle of 90◦. A relative velocity bias of −39% with a standard deviation of 13% was found. In-vivo acquisitions show complex flow patterns in the heart. In the aortic valve view, blood is seen exiting the left ventricle cavity through the aortic valve into the aorta during the systolic phase of the cardiac cycle.
In the left ventricle view, blood flow is seen entering the left ventricle cavity through the mitral valve and splitting in two ways when approximating the left ventricle wall. The work presents 2-D velocity estimates on the heart from a non-invasive transthoracic scan. The ability of the method detecting flow regardless of the beam angle could potentially reveal a more complete view of the flow patterns presented on the heart.
Language: | English |
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Publisher: | SPIE - International Society for Optical Engineering |
Year: | 2016 |
Pages: | 979004-979004-9 |
Proceedings: | SPIE Medical Imaging 2016 |
Series: | Progress in Biomedical Optics and Imaging - Proceedings of Spie |
Journal subtitle: | Ultrasonic Imaging and Tomography |
ISBN: | 1510600256 and 9781510600256 |
ISSN: | 24109045 , 16057422 , 1996756x and 0277786x |
Types: | Conference paper |
DOI: | 10.1117/12.2216707 |
ORCIDs: | Villagómez Hoyos, Carlos Armando , Stuart, Matthias Bo , Jensen, Jørgen Arendt and 0000-0002-9380-1688 |