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Influence of Guided Waves in Tibia on Non-linear Scattering of Contrast Agents.
- Source :
-
Ultrasound in medicine & biology [Ultrasound Med Biol] 2016 Feb; Vol. 42 (2), pp. 561-73. Date of Electronic Publication: 2015 Nov 28. - Publication Year :
- 2016
-
Abstract
- The aim of this study was to elucidate the linear and non-linear responses of ultrasound contrast agent (UCA) to frequency-dispersive guided waves from the tibia cortex, particularly two individual modes, S0 (1.23 MHz) and A1 (2.06 MHz). The UCA responses to guided waves were illustrated through the Marmottant model derived from measured guided waves, and then verified by continuous infusion experiments in a vessel-tibia flow phantom. These UCA responses were further evaluated by the enhanced ratio of peak values and the resolutions of UCA backscattered echoes. Because of the individual modes S0 and A1 in the tibia, the peak values of the UCA backscattered echoes were enhanced by 83.57 ± 7.35% (p < 0.05) and 80.77 ± 6.60% (p < 0.01) in the UCA subharmonic frequency and subharmonic imaging, respectively. However, corresponding resolutions were 0.78 ± 0.07 (p < 0.05) and 0.72 ± 0.12 (p < 0.01) times those without guided wave disturbances, respectively. Even though the resolution was partly degenerated, the subharmonic detection sensitivity of UCA was improved by the guided waves. Thus, UCA responses to the double-frequency guided waves should be further explored to benefit the detection of capillary perfusion in tissue layers near the bone cortex, particularly for perfusion imaging in the free flaps and skeletal muscles.<br /> (Copyright © 2016 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.)
- Subjects :
- Animals
Computer Simulation
Dose-Response Relationship, Radiation
Humans
Nonlinear Dynamics
Radiation Dosage
Scattering, Radiation
Tissue Distribution radiation effects
Contrast Media chemistry
Contrast Media radiation effects
Models, Biological
Sonication methods
Tibia radiation effects
Ultrasonic Waves
Subjects
Details
- Language :
- English
- ISSN :
- 1879-291X
- Volume :
- 42
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Ultrasound in medicine & biology
- Publication Type :
- Academic Journal
- Accession number :
- 26617242
- Full Text :
- https://doi.org/10.1016/j.ultrasmedbio.2015.10.006