To improve temporal resolution on an image, what should be used?

• A. Longer exposure time
• B. Higher mA
• C. Slower screen
• D. Shorter exposure time

Answer: (D)

Temporal resolution refers to how well a system can capture rapid changes over time. Motion during an exposure causes blur, so reducing the time the image is exposed to x-rays helps freeze motion and improves temporal resolution. Using a shorter exposure time directly minimizes the window in which motion can blur details, making it the most effective way to enhance temporal resolution.

Longer exposure time would allow more motion blur and worsen temporal resolution. Increasing mA increases brightness and noise performance but doesn’t shorten the exposure duration itself, so it doesn’t directly improve temporal resolution. A slower screen would require a longer exposure to reach the same density, also increasing motion blur.