A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
CARDIAC SHEAR WAVE VELOCITY DETECTION IN THE PORCINE HEART
Tekijät: Vos HJ, van Dalen BM, Heinonen I, Bosch JG, Sorop O, Duncker DJ, van der Steen AFW, de Jong N
Kustantaja: ELSEVIER SCIENCE INC
Julkaisuvuosi: 2017
Journal: Ultrasound in Medicine and Biology
Tietokannassa oleva lehden nimi: ULTRASOUND IN MEDICINE AND BIOLOGY
Lehden akronyymi: ULTRASOUND MED BIOL
Vuosikerta: 43
Numero: 4
Aloitussivu: 753
Lopetussivu: 764
Sivujen määrä: 12
ISSN: 0301-5629
DOI: https://doi.org/10.1016/j.ultrasmedbio.2016.11.015
Tiivistelmä
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. (C) 2016 The Authors. Published by Elsevier Inc. on behalf of World Federation for Ultrasound in Medicine & Biology.
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. (C) 2016 The Authors. Published by Elsevier Inc. on behalf of World Federation for Ultrasound in Medicine & Biology.
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