TY - JOUR
T1 - High-resolution monitoring of the velocity of ultrasound in contracted and relaxed human muscle
AU - Hossain, M. Zakir
AU - Grill, Wolfgang
N1 - Publisher Copyright:
© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2019/7/4
Y1 - 2019/7/4
N2 - A differential detection scheme has been developed to monitor the variations of the velocity of longitudinal polarised ultrasound waves travelling in contracted and relaxed human muscle, compensating for variations of the path length by referencing to a frame. This allows to monitor in vivo changes of the velocity of ultrasound travelling in human muscle with so far not reported resolution. To achieve this, the monitored muscle is placed into a rigid enclosure to minimise deformations under contraction. Detected is a maximum increase in the speed of ultrasound from 1 to 3.7 MHz of only (0.6 ± 0.05)% under contraction. Results are compared to modelling based on well-established rather elementary assumptions for idealised liquids and soft mater and to features derived from related published observations and assumptions. Knowledge on variations of the velocity of ultrasonic waves as demonstrated here is important for image reconstruction in ultrasonic imaging and for modelling of the mechanical properties of muscles, since Young's modulus and the shear modulus, both determining furthermore Poisson's number, representing together the mechanical properties of homogeneous matter can all be derived from the measured data.
AB - A differential detection scheme has been developed to monitor the variations of the velocity of longitudinal polarised ultrasound waves travelling in contracted and relaxed human muscle, compensating for variations of the path length by referencing to a frame. This allows to monitor in vivo changes of the velocity of ultrasound travelling in human muscle with so far not reported resolution. To achieve this, the monitored muscle is placed into a rigid enclosure to minimise deformations under contraction. Detected is a maximum increase in the speed of ultrasound from 1 to 3.7 MHz of only (0.6 ± 0.05)% under contraction. Results are compared to modelling based on well-established rather elementary assumptions for idealised liquids and soft mater and to features derived from related published observations and assumptions. Knowledge on variations of the velocity of ultrasonic waves as demonstrated here is important for image reconstruction in ultrasonic imaging and for modelling of the mechanical properties of muscles, since Young's modulus and the shear modulus, both determining furthermore Poisson's number, representing together the mechanical properties of homogeneous matter can all be derived from the measured data.
KW - Velocity of ultrasound in muscle
KW - ultrasonic monitoring of human muscle
KW - velocity of ultrasound in contracted muscle
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U2 - 10.1080/21681163.2018.1449138
DO - 10.1080/21681163.2018.1449138
M3 - Article
AN - SCOPUS:85065537257
SN - 2168-1163
VL - 7
SP - 414
EP - 419
JO - Computer Methods in Biomechanics and Biomedical Engineering: Imaging and Visualization
JF - Computer Methods in Biomechanics and Biomedical Engineering: Imaging and Visualization
IS - 4
ER -