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Coronary artery disease is a deadly and costly condition and represents an important public health issue globally. Coronary Doppler vibrometry (CDV), a new noninvasive coronary artery stenosis detection technique, showed encouraging results in our recent clinical study. However, the CDV system required lengthy offline data analysis, thus it did not provide(More)
Motion-compensated time-averaged imaging (MTI), a method of accumulating frames with a motion compensation technique using small subregions was conducted to improve power Doppler and B-mode imaging. In our previous study, MTI was shown to be able to clearly image vasculature with contrast agents without image blurring even if the target tissue was moving(More)
Color Doppler imaging (CDI) produces qualitative blood flow information in a 2D region of interest (ROI) but has low temporal resolution, while spectral Doppler can provide quantitative information, but its measurements are limited along a single scanline. These are inherent limitations associated with the conventional focused pulse-echo method. The(More)
Various vector Doppler methods have been proposed in the last several decades to overcome the Doppler angle dependency in both conventional spectral Doppler and color Doppler by measuring both the speed and direction of blood flow. However, they have not been adopted for routine use because most of them require specialized hardware, which is not available(More)
One of the key additions to clinical ultrasound (US) systems during the last decade has been the incorporation of three-dimensional (3D) imaging as a native mode. These systems provide interactive volume rendering and display of 3D data. However, interactive volume rendering is challenging due to the large amount of data I/O and computation required. Many(More)
The Bernoulli effect may result in eruption of a vulnerable carotid atheroma, causing a stroke. We measured electrocardiography (ECG)-registered QRS intra-stenotic blood velocity and atheroma strain dynamics in carotid artery walls using ultrasonic tissue Doppler methods, providing displacement and time resolutions of 0.1 μm and 3.7 ms. Of 22 arteries, 1(More)
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