TY - JOUR
T1 - Pressure Difference Estimation in Non-stenotic Carotid Bifurcation Phantoms Using Vector Flow Imaging
AU - Nguyen, Tin Quoc
AU - Traberg, Marie Sand
AU - Olesen, Jacob Bjerring
AU - Moshavegh, Ramin
AU - Møller-Sørensen, Peter Hasse
AU - Lönn, Lars
AU - Jensen, Jørgen Arendt
AU - Nielsen, Michael Bachmann
AU - Hansen, Kristoffer Lindskov
PY - 2021
Y1 - 2021
N2 - Local pressure differences estimated using vector flow imaging (VFI) and direct catheterization in seven carotid bifurcation phantoms were compared with simulated pressure fields. VFI correlated strongly with simulated peak pressure differences (r = 0.99, p < 0.00001), with an average overestimation of 12.3 Pa (28.6%). The range between the lowest and highest pressure difference of VFI underestimated simulations by 4.6 Pa (8.06%; r = 0.99, p < 0.0001). The catheter method exhibited no correlation (r = –0.09, p = 0.85). Ten repeated measurements on one phantom revealed a small standard deviation (SD) for VFI (SD = 8.4%, mean estimated SD = 11.5%), but not for the catheter method (SD = 785.6%). An in vivo peak systolic pressure difference of 97.9 Pa (estimated SD = 30%) was measured using VFI in one healthy individual. This study indicates that VFI pressure difference estimation is feasible in phantoms and in vivo and realistic estimates of the SD can be attained from the data.
AB - Local pressure differences estimated using vector flow imaging (VFI) and direct catheterization in seven carotid bifurcation phantoms were compared with simulated pressure fields. VFI correlated strongly with simulated peak pressure differences (r = 0.99, p < 0.00001), with an average overestimation of 12.3 Pa (28.6%). The range between the lowest and highest pressure difference of VFI underestimated simulations by 4.6 Pa (8.06%; r = 0.99, p < 0.0001). The catheter method exhibited no correlation (r = –0.09, p = 0.85). Ten repeated measurements on one phantom revealed a small standard deviation (SD) for VFI (SD = 8.4%, mean estimated SD = 11.5%), but not for the catheter method (SD = 785.6%). An in vivo peak systolic pressure difference of 97.9 Pa (estimated SD = 30%) was measured using VFI in one healthy individual. This study indicates that VFI pressure difference estimation is feasible in phantoms and in vivo and realistic estimates of the SD can be attained from the data.
KW - Pressure difference estimation
KW - Ultrasound
KW - Vector flow imaging
KW - Fluid-filled pressure catheter
KW - Computational fluid dynamics
KW - Fluid–structure interaction
KW - Carotid bifurcation
U2 - 10.1016/j.ultrasmedbio.2021.10.004
DO - 10.1016/j.ultrasmedbio.2021.10.004
M3 - Journal article
C2 - 34763906
SN - 0301-5629
VL - 48
SP - 346
EP - 357
JO - Ultrasound in Medicine and Biology
JF - Ultrasound in Medicine and Biology
IS - 2
ER -