Design of a continuous wave blood flow bi-directional Doppler system.

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Signal Processing

Background:

• Continuous wave Doppler systems are essential for blood flow measurement.
• Existing high-end systems are often expensive and not portable.
• There is a need for cost-effective, high-resolution Doppler solutions.

Purpose of the Study:

• To design and describe a portable, low-cost continuous wave blood flow bi-directional Doppler system.
• To integrate advantages of expensive systems into an open, high-resolution architecture.
• To provide a platform for incorporating advanced spectral estimation methods.

Main Methods:

• The system comprises a flow detector probe, signal conditioning, direction detection, signal processing, and a GUI.
• Direction detection utilizes a fast digital phasing filter.
• Doppler signal processing employs a short-time Fourier transform (STFT) algorithm, with flexibility for alternatives.

Main Results:

• A functional continuous wave blood flow bi-directional Doppler system was designed.
• The system is portable, low-cost, and features an open, high-resolution architecture.
• The design allows for the integration of alternative spectral estimation techniques.

Conclusions:

• The developed system offers a cost-effective and portable solution for bi-directional blood flow measurement.
• Its open architecture facilitates future enhancements and integration of advanced signal processing.
• This system has the potential to provide precise hemodynamic information to specialists.