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Spectrum analysis of continuous wave doppler ultrasound signals of the extracranial carotid artery

, : Spectrum analysis of continuous wave doppler ultrasound signals of the extracranial carotid artery. Vasa 14(2): 131-138

Different systems for continuous-wave Doppler ultrasound signal analysis were evaluated with view to their diagnostic accuracy for the detection of nonstenotic early carotid plaques and irregularities. Patients (22) (28 extracranial carotid vessels) were studied both by ultrasound and arteriography, the results of which being compared using 2-by-2 table tests. Audio-signal analysis proved to be highly sensitive (79%) and specific (78%), resulting in an overall test accuracy of 79%. None of the other methods (AIF, Octave-Spectrum Analysis, FFT and SFT) significantly improved the diagnostic accuracy, however, all of them are useful for objective recording of Doppler signals including turbulences.

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