In-vivo convex array vector flow imaging
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In-vivo convex array vector flow imaging. / Jensen, Jørgen Arendt; Brandt, Andreas Hjelm; Nielsen, Michael Bachmann.
IEEE International Ultrasonics Symposium, IUS. IEEE Computer Society Press, 2014. p. 333-336 6931909 (IEEE International Ultrasonics Symposium, IUS).Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
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TY - GEN
T1 - In-vivo convex array vector flow imaging
AU - Jensen, Jørgen Arendt
AU - Brandt, Andreas Hjelm
AU - Nielsen, Michael Bachmann
N1 - Publisher Copyright: © 2014 IEEE.
PY - 2014/10/20
Y1 - 2014/10/20
N2 - In-vivo VFI scans obtained from the abdomen of a human volunteer using a convex array transducers and transverse 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.
AB - In-vivo VFI scans obtained from the abdomen of a human volunteer using a convex array transducers and transverse 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.
UR - http://www.scopus.com/inward/record.url?scp=84910063539&partnerID=8YFLogxK
U2 - 10.1109/ULTSYM.2014.0082
DO - 10.1109/ULTSYM.2014.0082
M3 - Article in proceedings
AN - SCOPUS:84910063539
T3 - IEEE International Ultrasonics Symposium, IUS
SP - 333
EP - 336
BT - IEEE International Ultrasonics Symposium, IUS
PB - IEEE Computer Society Press
T2 - 2014 IEEE International Ultrasonics Symposium, IUS 2014
Y2 - 3 September 2014 through 6 September 2014
ER -
ID: 331501694