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Do ultrasonic contrast agents artificially increase maximum Doppler shift? In vivo study of human common carotid arteries.
- Source :
-
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine [J Ultrasound Med] 1998 Feb; Vol. 17 (2), pp. 97-102. - Publication Year :
- 1998
-
Abstract
- The aim of this study was to establish whether an increase of maximum Doppler shift occurs in the human common carotid artery after the administration of Levovist, an ultrasonographic echo enhancer. Twenty common carotid arteries of 10 patients were examined. Spectral Doppler waveform examinations were performed before and after administration of Levovist using an Acuson 128 XP 10 and a 7.0 MHz transducer probe. Time averaged mean velocity, peak velocity, maximum Doppler shift, and spectral Doppler indices (pulsatility index, resistive index, systolic-diastolic ratio) were assessed. No significant changes in any of the measured parameters, including maximum Doppler shifts, peak velocity (P = 0.35, Wilcoxon rank sum test), pulsatility indices (P = 0.70), resistive indices (P = 0.98), or other spectral indices, were found. We conclude that an increase in Doppler shift does not inevitably occur after the administration of a signal enhancer when examining the human common carotid artery.
- Subjects :
- Blood Flow Velocity
Diastole
Female
Heart Rate
Humans
Image Enhancement
Image Processing, Computer-Assisted
Male
Middle Aged
Pulsatile Flow
Regression Analysis
Systole
Vascular Resistance
Carotid Artery, Common diagnostic imaging
Contrast Media administration & dosage
Doppler Effect
Polysaccharides administration & dosage
Ultrasonography, Doppler methods
Subjects
Details
- Language :
- English
- ISSN :
- 0278-4297
- Volume :
- 17
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
- Publication Type :
- Academic Journal
- Accession number :
- 9527579
- Full Text :
- https://doi.org/10.7863/jum.1998.17.2.97