TY - JOUR
T1 - Cardiac Shear Wave Velocity Detection in the Porcine Heart
AU - Vos, Hendrik J.
AU - van Dalen, Bas M.
AU - Heinonen, Ilkka
AU - Bosch, Johan G.
AU - Sorop, Oana
AU - Duncker, Dirk J.
AU - van der Steen, Antonius F.W.
AU - de Jong, Nico
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Cardiac muscle stiffness can potentially be estimated non-invasively with shear wave elastography. Shear waves are present on the septal wall after mitral and aortic valve closure, thus providing an opportunity to assess stiffness in early systole and early diastole. We report on the shear wave recordings of 22 minipigs with high-frame-rate echocardiography. The waves were captured with 4000 frames/s using a programmable commercial ultrasound machine. The wave pattern was extracted from the data through a local tissue velocity estimator based on one-lag autocorrelation. The wave propagation velocity was determined with a normalized Radon transform, resulting in median wave propagation velocities of 2.2 m/s after mitral valve closure and 4.2 m/s after aortic valve closure. Overall the velocities ranged between 0.8 and 6.3 m/s in a 95% confidence interval. By dispersion analysis we found that the propagation velocity only mildly increased with shear wave frequency.
AB - Cardiac muscle stiffness can potentially be estimated non-invasively with shear wave elastography. Shear waves are present on the septal wall after mitral and aortic valve closure, thus providing an opportunity to assess stiffness in early systole and early diastole. We report on the shear wave recordings of 22 minipigs with high-frame-rate echocardiography. The waves were captured with 4000 frames/s using a programmable commercial ultrasound machine. The wave pattern was extracted from the data through a local tissue velocity estimator based on one-lag autocorrelation. The wave propagation velocity was determined with a normalized Radon transform, resulting in median wave propagation velocities of 2.2 m/s after mitral valve closure and 4.2 m/s after aortic valve closure. Overall the velocities ranged between 0.8 and 6.3 m/s in a 95% confidence interval. By dispersion analysis we found that the propagation velocity only mildly increased with shear wave frequency.
KW - Echocardiography
KW - High-frame-rate imaging
KW - Shear wave elastography
KW - Stiffness measurements
KW - Valve closure
UR - http://www.scopus.com/inward/record.url?scp=85008507505&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:19f8c29d-20f8-4790-8a6e-6f8e715ed6a5
U2 - 10.1016/j.ultrasmedbio.2016.11.015
DO - 10.1016/j.ultrasmedbio.2016.11.015
M3 - Article
AN - SCOPUS:85008507505
SN - 0301-5629
VL - 43
SP - 753
EP - 764
JO - Ultrasound in Medicine & Biology
JF - Ultrasound in Medicine & Biology
IS - 4
ER -