Reduction of coherent scattering noise with multiple receiver Doppler

Area of Science:

• Medical Imaging
• Ultrasound Technology
• Biomedical Engineering

Background:

• Doppler ultrasound (US) velocity estimation is prone to errors from Doppler ambiguity and coherent scattering.
• Coherent scattering errors arise from phase changes in returning echoes due to particle movement and receiver angle.
• Accurate velocity estimation is crucial for various diagnostic applications.

Purpose of the Study:

• To investigate the independence of velocity estimates obtained from receiver probes at different angles.
• To determine if combining data from multiple angled receivers can improve Doppler US velocity estimation.
• To propose a novel Doppler method for reducing velocity estimation errors.

Main Methods:

• A numerical simulation was employed to model Doppler ultrasound data.
• Velocity estimates were generated using receiver probes positioned at varying angles.
• The cross-correlation between velocity estimates from different probe angles was analyzed.

Main Results:

• Velocity estimates obtained from receiver probes at different angles were found to be largely independent.
• A significant reduction in cross-correlation (to 0.3) was observed when receiver probes were oriented 5 degrees apart.
• Simulation results indicate the feasibility of combining data from multiple receivers.

Conclusions:

• Combining Doppler US velocity estimates from multiple, angled receiver probes can mitigate coherent scattering errors.
• The proposed multi-receiver Doppler method offers a significant reduction in velocity estimation error.
• This approach has the potential to enhance the accuracy and reliability of Doppler ultrasound diagnostics.