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Endovascular stent has an increasingly important application in the treatment of aneurysms. This study is to simulate Doppler ultrasound blood flow signals from a stented sidewall aneurysm based on a computational fluid dynamics model. For comparisons, a stented and non-stented sidewall aneurysm models are constructed respectively. Firstly the blood flow velocity distribution in the area of the sidewall...
Objective: To assess the feasibility and accuracy of Doppler audio-signal Processing system (DASPS) in noninvasive automatic estimation of pulmonary vascular resistance(PVR). Methods: PVR was estimated with DASPS in 32 children with left-to-right shunting congenital heart disease, compared with those estimated by Doppler echocardiography and cardiac catheterization. Results: PVR estimated by DASPS...
The objective of this paper is to assess the accuracy of audio signal Processing system in noninvasive automatic estimation of Pulmonary arterial pressure(PAP). Comparative studies among Doppler echocardiography, audio signal processing system (ASPS) and cardiac catheterization for predicting PAP have been done in 51 children with left-to-right shunting congenital heart disease. Estimated pulmonary...
A novel approach for blood and wall signal separation in Doppler ultrasound is proposed in the wavelet time-scale domain. The Doppler signals of different clutter-to-blood ratios from a femoral artery were simulated and used in the experiments. Compared with the conventional high-pass filtering and the signal separation in the spectrogram, the new method delivers improved performance for "wall...
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