Increasing imaging depth and scan line density results in

Increasing imaging depth and scan line density results in

• A. Reduced contrast resolution
• B. Reduced lateral resolution
• C. Reduced temporal resolution
• D. Improved axial resolution

Answer: (C)

Temporal resolution is about how often frames are acquired, i.e., the frame rate. Pushing imaging depth makes each scan line take longer because the pulse must travel farther and return, and increasing scan line density adds more lines per frame, so more data must be collected for each frame. Both effects slow down frame acquisition, lowering the frame rate and thus reducing temporal resolution. While deeper imaging can affect contrast due to attenuation and can influence resolution in other ways, the most direct consequence of greater depth and more scan lines is a slower frame rate, i.e., reduced temporal resolution.

Temporal resolution is about how often frames are acquired, i.e., the frame rate. Pushing imaging depth makes each scan line take longer because the pulse must travel farther and return, and increasing scan line density adds more lines per frame, so more data must be collected for each frame. Both effects slow down frame acquisition, lowering the frame rate and thus reducing temporal resolution. While deeper imaging can affect contrast due to attenuation and can influence resolution in other ways, the most direct consequence of greater depth and more scan lines is a slower frame rate, i.e., reduced temporal resolution.