In-vivo Convex Array Vector Flow Imaging

Jørgen Arendt Jensen, Andreas Hjelm Brandt, Michael Bachmann Nielsen

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Abstract

In-vivo VFI scans obtained from the abdomen of a human volunteer using a convex array transducers and trans- verse oscillation vector flow imaging (VFI) are presented. A 3 MHz BK Medical 8820e (Herlev, Denmark) 192-element convex array probe is used with the SARUS experimental ultrasound scanner. A sequence with a 129-line B-mode image is followed by a VFI sequence in 17 directions with 32 emissions in each direction. The pulse repetition frequency was set to 5 kHz, and the intensity and MI were measured with the Acoustic Intensity Measurement System AIMS III (Onda, Sunnyvale, California, USA). The derated Ispta:3 was 79.7 mW/m2 and MI was 1.32, which are within FDA limits for abdominal scans. The right liver lobe of a 28-year healthy volunteer was scanned with a view of the main portal vein and vena cava inferior at a frame rate of 7.4 Hz. Thirty frames were acquired, giving 4 seconds of data. For this volunteer the duration corresponded to roughly 3 heartbeats. The velocities were found at a beam-to-flow angle of 72 21, where a conventional CFM scan would yield poor results. Three VF images from the same position in the cardiac cycle were investigated and the mean lateral velocities were -0.079, -0.081 and -0.080 m/s showing the consistence of the in-vivo results.
Original languageEnglish
Title of host publicationProceedings of IEEE International Ultrasonics Symposium
Number of pages5
PublisherIEEE
Publication date2014
Pages333-336
ISBN (Print)978-1-4799-7049-0
DOIs
Publication statusPublished - 2014
Event2014 IEEE International Ultrasonics Symposium - Hilton Hotel, Chicago, IL, United States
Duration: 3 Sep 20146 Sep 2014

Conference

Conference2014 IEEE International Ultrasonics Symposium
LocationHilton Hotel
CountryUnited States
CityChicago, IL
Period03/09/201406/09/2014

Cite this

Jensen, J. A., Brandt, A. H., & Nielsen, M. B. (2014). In-vivo Convex Array Vector Flow Imaging. In Proceedings of IEEE International Ultrasonics Symposium (pp. 333-336). IEEE. https://doi.org/10.1109/ULTSYM.2014.0082