TY - JOUR
T1 - VASCULAR ELASTOGRAPHY: A VALIDATION STUDY
AU - Lopata, Richard G. P.
AU - Peters, Mathijs F. J.
AU - Nijs, Jan
AU - Oomens, Cees W. J.
AU - Rutten, Marcel C. M.
AU - van de Vosse, Frans N.
PY - 2014/8
Y1 - 2014/8
N2 - Vascular elastography techniques are promising tools for mechanical characterization of diseased arteries. These techniques are usually validated with simulations or phantoms or by comparing results with histology or other imaging modalities. In the study described here, vascular elastography was applied to porcine aortas in vitro during inflation testing (n = 10) and results were compared with those of standard bi-axial tensile testing, a technique that directly measures the force applied to the tissue. A neo-Hookean model was fit to the stress-strain data, valid for large deformations. Results indicated good correspondence between the two techniques, with GUS = 110 ? 11 kPa and GTT = 108 ? 10 kPa for ultrasound and tensile testing, respectively. Bland-Altman analysis revealed little bias (GUS-GTT = 2 ? 20 kPa). The next step will be the application of a non-linear material model that is also adaptable for in vivo measurements. World Federation for Ultrasound in Medicine & Biology.
AB - Vascular elastography techniques are promising tools for mechanical characterization of diseased arteries. These techniques are usually validated with simulations or phantoms or by comparing results with histology or other imaging modalities. In the study described here, vascular elastography was applied to porcine aortas in vitro during inflation testing (n = 10) and results were compared with those of standard bi-axial tensile testing, a technique that directly measures the force applied to the tissue. A neo-Hookean model was fit to the stress-strain data, valid for large deformations. Results indicated good correspondence between the two techniques, with GUS = 110 ? 11 kPa and GTT = 108 ? 10 kPa for ultrasound and tensile testing, respectively. Bland-Altman analysis revealed little bias (GUS-GTT = 2 ? 20 kPa). The next step will be the application of a non-linear material model that is also adaptable for in vivo measurements. World Federation for Ultrasound in Medicine & Biology.
KW - Ultrasound
KW - Aorta
KW - Elastography
KW - Bi-axial tensile test
KW - Mechanical characterization
U2 - 10.1016/j.ultrasmedbio.2014.02.029
DO - 10.1016/j.ultrasmedbio.2014.02.029
M3 - Article
C2 - 24798385
SN - 0301-5629
VL - 40
SP - 1882
EP - 1895
JO - Ultrasound in Medicine and Biology
JF - Ultrasound in Medicine and Biology
IS - 8
ER -