Doppler ultrasound spectral shape downstream of significant arterial stenosis in vivo
| Autor: | K.J. Hutchison |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Carotid Artery Common Systole Quantitative Biology::Tissues and Organs Acceleration Physics::Medical Physics Biophysics Spectral line Electrocardiography Flow separation Dogs Nuclear magnetic resonance Heart Rate medicine Animals Carotid Stenosis Radiology Nuclear Medicine and imaging Jet (fluid) Fourier Analysis Radiological and Ultrasound Technology Turbulence Arterial stenosis Signal Processing Computer-Assisted Blood flow Anatomy medicine.disease Stenosis Regional Blood Flow Ultrasonography Doppler Pulsed Pulsatile Flow Hemorheology Blood Flow Velocity Doppler broadening |
| Zdroj: | Ultrasound in Medicine & Biology. 21:447-458 |
| ISSN: | 0301-5629 |
| DOI: | 10.1016/0301-5629(94)00144-3 |
| Popis: | Peak analysis was applied to pulsed Doppler ultrasound spectra from in vivo poststenotic velocity fields of canine common carotid arteries. Turbulent spectra from a region of jet breakup, five diameters (5 D) down from a 68% diameter reducing stenosis, were closely approximated by a single Gaussian peak. Multiple peaks resulting from the analysis of complex spectra from the shear layers between jet and recirculation zones, 1.5 D downstream of a 40% stenosis, correlated well with the known features of the poststenotic velocity field. It is concluded that peak analysis can be used to separate the spectral components of distinct flow regimes from the complex spectra of regions of complicated flow. This may provide a method for the diagnosis of mild degrees of arterial stenosis using pulsed Doppler ultrasound. |
| Databáze: | OpenAIRE |
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