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

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

• A. Spatial Compounding
• B. Shadowing
• C. Reflections
• D. Scattering

Answer: (A)

Spatial compounding combines ultrasound data acquired from multiple viewing angles into a single image. Speckle is a grainy pattern created by interference of echoes from tiny structures. By capturing from different angles, the speckle patterns decorrelate, so averaging these views reduces the noise and yields a clearer image of tissue boundaries and lesions. This technique can enhance contrast and detail, though it may trade off some temporal resolution since multiple angles are required. The other concepts don’t involve combining data from different angles: shadowing hides behind an attenuating object, reflections come from interfaces, and scattering describes how sound is redirected in many directions without image compounding.

Spatial compounding combines ultrasound data acquired from multiple viewing angles into a single image. Speckle is a grainy pattern created by interference of echoes from tiny structures. By capturing from different angles, the speckle patterns decorrelate, so averaging these views reduces the noise and yields a clearer image of tissue boundaries and lesions. This technique can enhance contrast and detail, though it may trade off some temporal resolution since multiple angles are required. The other concepts don’t involve combining data from different angles: shadowing hides behind an attenuating object, reflections come from interfaces, and scattering describes how sound is redirected in many directions without image compounding.