Elevational resolution is determined by ______.

Elevational resolution is determined by ______.

• A. Slice thickness
• B. Frame rate
• C. Depth
• D. Lateral

Answer: (A)

Elevational resolution is determined by slice thickness. In ultrasound, this dimension refers to the distance perpendicular to the imaging plane—the thickness of the scanned slice. The ability to distinguish structures in that direction depends on how thin that slice is: a thinner slice yields better elevational resolution because you’re sampling a smaller volume. Frame rate affects temporal resolution, not the thickness of the slice. Depth influences penetration and how far you can image, but not how thin the elevational slice is. Lateral resolution depends on beam width within the imaging plane, not on slice thickness. So the key factor is the thickness of the ultrasound slice.

Elevational resolution is determined by slice thickness. In ultrasound, this dimension refers to the distance perpendicular to the imaging plane—the thickness of the scanned slice. The ability to distinguish structures in that direction depends on how thin that slice is: a thinner slice yields better elevational resolution because you’re sampling a smaller volume. Frame rate affects temporal resolution, not the thickness of the slice. Depth influences penetration and how far you can image, but not how thin the elevational slice is. Lateral resolution depends on beam width within the imaging plane, not on slice thickness. So the key factor is the thickness of the ultrasound slice.