TY - JOUR
T1 - Vector Flow Imaging Compared with Pulse Wave Doppler for Estimation of Peak Velocity in the Portal Vein
AU - Brandt, Andreas Hjelm
AU - Moshavegh, Ramin
AU - Hansen, Kristoffer Lindskov
AU - Bechsgaard, Thor
AU - Lönn, Lars
AU - Jensen, Jørgen Arendt
AU - Nielsen, Michael Bachmann
N1 - Copyright © 2018 World Federation for Ultrasound in Medicine and Biology. Published by Elsevier Inc. All rights reserved.
PY - 2018/3
Y1 - 2018/3
N2 - The study described here investigated whether angle-independent vector flow imaging (VFI) technique estimates peak velocities in the portal vein comparably to pulsed wave Doppler (PWD). Furthermore, intra- and inter-observer agreement was assessed in a substudy. VFI and PWD peak velocities were estimated with from intercostal and subcostal views for 32 healthy volunteers, and precision analyses were conducted. Blinded to estimates, three physicians rescanned 10 volunteers for intra- and inter-observer agreement analyses. The precision of VFI and PWD was 18% and 28% from an intercostal view and 23% and 77% from a subcostal view, respectively. Bias between VFI and PWD was 0.57 cm/s (p = 0.38) with an intercostal view and 9.89 cm/s (p <0.001) with a subcostal view. Intra- and inter-observer agreement was highest for VFI (inter-observer intra-class correlation coefficient: VFI 0.80, PWD 0.3; intra-observer intra-class correlation coefficient: VFI 0.90, PWD 0.69). Regardless of scan view, VFI was more precise than PWD.
AB - The study described here investigated whether angle-independent vector flow imaging (VFI) technique estimates peak velocities in the portal vein comparably to pulsed wave Doppler (PWD). Furthermore, intra- and inter-observer agreement was assessed in a substudy. VFI and PWD peak velocities were estimated with from intercostal and subcostal views for 32 healthy volunteers, and precision analyses were conducted. Blinded to estimates, three physicians rescanned 10 volunteers for intra- and inter-observer agreement analyses. The precision of VFI and PWD was 18% and 28% from an intercostal view and 23% and 77% from a subcostal view, respectively. Bias between VFI and PWD was 0.57 cm/s (p = 0.38) with an intercostal view and 9.89 cm/s (p <0.001) with a subcostal view. Intra- and inter-observer agreement was highest for VFI (inter-observer intra-class correlation coefficient: VFI 0.80, PWD 0.3; intra-observer intra-class correlation coefficient: VFI 0.90, PWD 0.69). Regardless of scan view, VFI was more precise than PWD.
KW - Adult
KW - Aged
KW - Blood Flow Velocity/physiology
KW - Female
KW - Humans
KW - Male
KW - Middle Aged
KW - Observer Variation
KW - Portal Vein/diagnostic imaging
KW - Reference Values
KW - Reproducibility of Results
KW - Ultrasonography/methods
KW - Ultrasonography, Doppler, Pulsed/methods
U2 - 10.1016/j.ultrasmedbio.2017.10.015
DO - 10.1016/j.ultrasmedbio.2017.10.015
M3 - Journal article
C2 - 29223701
SN - 0301-5629
VL - 44
SP - 593
EP - 601
JO - Ultrasound in Medicine & Biology
JF - Ultrasound in Medicine & Biology
IS - 3
ER -