To maintain the same temporal resolution after expanding the image sector width to visualize a large mass, which adjustment should be made?

To maintain the same temporal resolution after expanding the image sector width to visualize a large mass, which adjustment should be made?

• A. Increase the digitization bit depth
• B. Increase the number of scan lines
• C. Decrease the number of pixels in the image matrix
• D. Decrease the number of focal zones

Answer: (D)

Temporal resolution is about how fast each frame is acquired. When you widen the image sector, more scan lines are needed to cover that broader view, so a frame takes longer and the frame rate drops. To keep the same temporal resolution, you adjust factors that affect how long it takes to acquire each line. Reducing the number of focal zones cuts the time spent focusing at multiple depths, so each line can be collected faster. This helps preserve the frame rate despite the wider sector. Increasing digitization bit depth changes image quality and dynamic range but not the acquisition speed. Increasing the number of scan lines would slow things down further. Decreasing the number of pixels in the image matrix reduces spatial resolution and isn’t the direct way to maintain temporal resolution when the sector is expanded.

Temporal resolution is about how fast each frame is acquired. When you widen the image sector, more scan lines are needed to cover that broader view, so a frame takes longer and the frame rate drops. To keep the same temporal resolution, you adjust factors that affect how long it takes to acquire each line. Reducing the number of focal zones cuts the time spent focusing at multiple depths, so each line can be collected faster. This helps preserve the frame rate despite the wider sector.

Increasing digitization bit depth changes image quality and dynamic range but not the acquisition speed. Increasing the number of scan lines would slow things down further. Decreasing the number of pixels in the image matrix reduces spatial resolution and isn’t the direct way to maintain temporal resolution when the sector is expanded.