Spectral analysis with digital presentation of C-W Doppler signals in the evaluation of carotid stenosis

Area of Science:

• Vascular Ultrasound
• Medical Imaging
• Diagnostic Technology

Background:

• Carotid artery disease is a significant cause of stroke.
• Accurate non-invasive assessment of carotid stenosis is crucial for patient management.
• Traditional ultrasound Doppler methods can be limited in precision.

Purpose of the Study:

• To evaluate the diagnostic performance of continuous-wave ultrasound Doppler with spectral analysis and digital processing for carotid artery stenosis.
• To establish reference values for Doppler shift characteristics in healthy subjects.
• To compare ultrasound Doppler findings with angiographic results.

Main Methods:

• Utilized a continuous-wave ultrasound Doppler system with Fast Fourier Transform (FFT) spectral analysis.
• Included digital processing and presentation of Doppler shift characteristics.
• Studied 40 healthy subjects to obtain reference values and analyzed 46 carotid arteries with concurrent angiography.

Main Results:

• Identified stenoses reducing internal carotid artery diameter by over 30% with 97% sensitivity and 100% specificity.
• Spectral analysis significantly improved the diagnostic utility of ultrasound Doppler.
• Digital processing enhanced diagnostic precision and provided permanent records.

Conclusions:

• Continuous-wave ultrasound Doppler with spectral analysis and digital processing is highly accurate for detecting significant carotid artery stenosis.
• The study emphasizes the need for well-trained sonographers and validated reference values.
• This technique offers improved diagnostic precision and permanent documentation for carotid artery disease evaluation.