Measurement of longitudinal and circumferential waves in tubes and artery excited with ultrasound radiation force

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

Increased arterial stiffness is associated with increased risk of cardiovascular events. Radiation force methods have been developed to investigate the longitudinal wave speeds of the artery with high spatial and temporal resolution. The artery is anisotropic so to fully characterize its material properties, we need to examine longitudinal and circumferential wave speeds. We used ultrasound radiation force to generate propagating waves in the wall of rubber tubes and an excised pig carotid artery and measured the wave motion using compounded plane wave imaging. To study the tubes we used two Verasonics systems equipped with linear array transducers. The transducers were placed 90° with respect to each other to obtain different views along the tube wall. One transducer applied a radiation force push and then both systems were used to detect the wall motion of the tube. One system was used for the artery experiment. The group velocity of the longitudinal wave, cl, was measured along the length of the vessel/tube. The motion near the radiation force push location was analyzed to measure the speed of the circumferential wave. We varied the transmural pressure over ranges of 10-30 mmHg and 20-200 mmHg for the tubes and artery, respectively. We confirmed the presence of circumferential waves by pushing on a tube with one transducer and measuring with the other transducer at 90°. We compared cl and c c in the tubes and found very good agreement in tube 1 and a bias in tube 2. It was expected that both wave speeds would be similar because the material is isotropic. The cl and cc values for the artery show similar trends but the cc values are lower than the c l values. We were able to measure values of cl and c c in tubes and arteries. The speeds measured in isotropic tubes were similar. The values of cc in an excised artery were shown to be lower than the values of cl.

Original languageEnglish (US)
Title of host publicationIEEE International Ultrasonics Symposium, IUS
Pages1765-1768
Number of pages4
DOIs
StatePublished - 2013
Event2013 IEEE International Ultrasonics Symposium, IUS 2013 - Prague, Czech Republic
Duration: Jul 21 2013Jul 25 2013

Other

Other2013 IEEE International Ultrasonics Symposium, IUS 2013
CountryCzech Republic
CityPrague
Period7/21/137/25/13

Fingerprint

longitudinal waves
arteries
tubes
radiation
transducers
swine
pushing
linear arrays
temporal resolution
rubber
group velocity
vessels
stiffness
plane waves
spatial resolution

Keywords

  • Anisotropic
  • Artery
  • Circumferential
  • Longitudinal
  • Pressure
  • Wave speed

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Measurement of longitudinal and circumferential waves in tubes and artery excited with ultrasound radiation force. / Urban, Matthew W; Nenadic, Ivan Z.; Pislaru, Cristina D; Greenleaf, James F.

IEEE International Ultrasonics Symposium, IUS. 2013. p. 1765-1768 6725153.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Urban, MW, Nenadic, IZ, Pislaru, CD & Greenleaf, JF 2013, Measurement of longitudinal and circumferential waves in tubes and artery excited with ultrasound radiation force. in IEEE International Ultrasonics Symposium, IUS., 6725153, pp. 1765-1768, 2013 IEEE International Ultrasonics Symposium, IUS 2013, Prague, Czech Republic, 7/21/13. https://doi.org/10.1109/ULTSYM.2013.0450
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N2 - Increased arterial stiffness is associated with increased risk of cardiovascular events. Radiation force methods have been developed to investigate the longitudinal wave speeds of the artery with high spatial and temporal resolution. The artery is anisotropic so to fully characterize its material properties, we need to examine longitudinal and circumferential wave speeds. We used ultrasound radiation force to generate propagating waves in the wall of rubber tubes and an excised pig carotid artery and measured the wave motion using compounded plane wave imaging. To study the tubes we used two Verasonics systems equipped with linear array transducers. The transducers were placed 90° with respect to each other to obtain different views along the tube wall. One transducer applied a radiation force push and then both systems were used to detect the wall motion of the tube. One system was used for the artery experiment. The group velocity of the longitudinal wave, cl, was measured along the length of the vessel/tube. The motion near the radiation force push location was analyzed to measure the speed of the circumferential wave. We varied the transmural pressure over ranges of 10-30 mmHg and 20-200 mmHg for the tubes and artery, respectively. We confirmed the presence of circumferential waves by pushing on a tube with one transducer and measuring with the other transducer at 90°. We compared cl and c c in the tubes and found very good agreement in tube 1 and a bias in tube 2. It was expected that both wave speeds would be similar because the material is isotropic. The cl and cc values for the artery show similar trends but the cc values are lower than the c l values. We were able to measure values of cl and c c in tubes and arteries. The speeds measured in isotropic tubes were similar. The values of cc in an excised artery were shown to be lower than the values of cl.

AB - Increased arterial stiffness is associated with increased risk of cardiovascular events. Radiation force methods have been developed to investigate the longitudinal wave speeds of the artery with high spatial and temporal resolution. The artery is anisotropic so to fully characterize its material properties, we need to examine longitudinal and circumferential wave speeds. We used ultrasound radiation force to generate propagating waves in the wall of rubber tubes and an excised pig carotid artery and measured the wave motion using compounded plane wave imaging. To study the tubes we used two Verasonics systems equipped with linear array transducers. The transducers were placed 90° with respect to each other to obtain different views along the tube wall. One transducer applied a radiation force push and then both systems were used to detect the wall motion of the tube. One system was used for the artery experiment. The group velocity of the longitudinal wave, cl, was measured along the length of the vessel/tube. The motion near the radiation force push location was analyzed to measure the speed of the circumferential wave. We varied the transmural pressure over ranges of 10-30 mmHg and 20-200 mmHg for the tubes and artery, respectively. We confirmed the presence of circumferential waves by pushing on a tube with one transducer and measuring with the other transducer at 90°. We compared cl and c c in the tubes and found very good agreement in tube 1 and a bias in tube 2. It was expected that both wave speeds would be similar because the material is isotropic. The cl and cc values for the artery show similar trends but the cc values are lower than the c l values. We were able to measure values of cl and c c in tubes and arteries. The speeds measured in isotropic tubes were similar. The values of cc in an excised artery were shown to be lower than the values of cl.

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