Which imaging technique reduces speckle by combining data from multiple angles?

Which imaging technique reduces speckle by combining data from multiple angles?

• A. Speckle reducing algorithm
• B. Spatial compounding
• C. Persistence
• D. Panoramic imaging

Answer: (B)

Combining information from multiple viewing angles is a method called spatial compounding. Speckle in ultrasound comes from coherent interference of echoes and changes with the angle of the scan. By acquiring images from different angles and averaging them into a single compounded image, the random speckle patterns tend to cancel each other out while the real tissue structures stay, leading to reduced speckle and better image clarity and contrast. Other approaches like temporal persistence average over time, or panoramic imaging stitches frames for a wider view, but they don’t leverage multi-angle data in the same way. So the technique that reduces speckle by combining data from multiple angles is spatial compounding.

Combining information from multiple viewing angles is a method called spatial compounding. Speckle in ultrasound comes from coherent interference of echoes and changes with the angle of the scan. By acquiring images from different angles and averaging them into a single compounded image, the random speckle patterns tend to cancel each other out while the real tissue structures stay, leading to reduced speckle and better image clarity and contrast. Other approaches like temporal persistence average over time, or panoramic imaging stitches frames for a wider view, but they don’t leverage multi-angle data in the same way. So the technique that reduces speckle by combining data from multiple angles is spatial compounding.