Key result
A new Disturbance Index based on double Fourier transformation of the ultrasound Doppler spectrum was developed and tested for quantifying internal carotid artery stenoses.
Why the study?
Does a Disturbance Index based on double Fourier transformation of ultrasound Doppler spectrum accurately quantify the degree of internal carotid artery stenoses compared to Duplex-scan and angiography?
Does a Disturbance Index based on double Fourier transformation of ultrasound Doppler spectrum accurately quantify the degree of internal carotid artery stenoses compared to Duplex-scan and angiography?
A novel Disturbance Index using double Fourier transformation of Doppler spectra may offer a new way to quantify lower grade internal carotid artery stenoses.
Answers are grounded in this paper and cite their sources.
May support lower-grade carotid stenosis quantification; leaves open prospective validation against angiography.
A new way of processing the ultrasound Doppler spectrum is presented. By introducing a Disturbance Index (DI), based on a double Fourier transformation, the quantitative evaluation of blood flow disturbance is possible. The integral value of this index over the whole cardiac cycle can be used to quantify the degree of lower grade internal carotid artery (ICA) stenoses and plaques. In a preliminary study, this new method has been tested in 18 normal and 10 atherosclerotic carotid arteries against Duplex-scan and angiography. The results were compared with 5 alternative methods of processing the Doppler spectrum.
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Paulat et al. (1985) studied Internal carotid artery stenoses and plaques (n=28). Disturbance Index (DI) via ultrasound Doppler signal processing vs. Duplex-scan, angiography, and 5 alternative Doppler processing methods was evaluated on Quantitative evaluation of blood flow disturbance and degree of internal carotid artery stenoses. A new Disturbance Index based on double Fourier transformation of the ultrasound Doppler spectrum was developed and tested for quantifying internal carotid artery stenoses.
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