High frame rate synthetic aperture vector flow imaging for transthoracic echocardiography.

Carlos Armando Villagómez Hoyos, Matthias Bo Stuart, Thor Bechsgaard, Michael Bachmann Nielsen, Jørgen Arendt Jensen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

436 Downloads (Pure)

Abstract

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.
Original languageEnglish
Title of host publicationProceedings of SPIE
EditorsNeb Duric, Brecht Heyde
Number of pages9
Volume9790
PublisherSPIE - International Society for Optical Engineering
Publication date2016
Article number979004
DOIs
Publication statusPublished - 2016
EventSPIE Medical Imaging 2016 : Ultrasonic Imaging and Tomography - Town & Country Resort and Convention Cente, San Diego, United States
Duration: 27 Feb 20163 Mar 2016
Conference number: 9790
https://spie.org/MI/conferencedetails/ultrasonic-imaging

Conference

ConferenceSPIE Medical Imaging 2016
Number9790
LocationTown & Country Resort and Convention Cente
CountryUnited States
CitySan Diego
Period27/02/201603/03/2016
Internet address

Keywords

  • Medical Ultrasound
  • Vector Flow Imaging
  • Cardiac Imaging
  • Blood Flow
  • Synthetic Aperture

Cite this

Villagómez Hoyos, C. A., Stuart, M. B., Bechsgaard, T., Nielsen, M. B., & Jensen, J. A. (2016). High frame rate synthetic aperture vector flow imaging for transthoracic echocardiography. In N. Duric, & B. Heyde (Eds.), Proceedings of SPIE (Vol. 9790). [979004] SPIE - International Society for Optical Engineering. https://doi.org/10.1117/12.2216707