In ultrasound, resolution describes which aspect of the image?

• A. Color depth
• B. Temporal resolution only
• C. Quality of the image
• D. Depth penetration

Answer: (C)

Resolution in ultrasound is about how clearly the image shows structures—the level of detail and sharpness you can discern between nearby features. Higher resolution means crisper borders and finer detail, which translates to better overall image quality. Color depth isn’t a factor in standard grayscale ultrasound, and depth penetration describes how deep the sound can travel rather than how clearly structures are resolved. Temporal resolution concerns how rapidly frames are acquired and how well motion is depicted, but it doesn’t define the static clarity of the image. So, the aspect most describing resolution is the quality or clarity of the image.