Elevational resolution refers to the ability to distinguish details in which orientation relative to the ultrasound beam?

Elevational resolution refers to the ability to distinguish details in which orientation relative to the ultrasound beam?

• A. Perpendicular to the beam
• B. Parallel to the beam
• C. Along the flow direction
• D. Across the transducer face

Answer: (A)

Elevational resolution is about the thickness of the ultrasound beam in the direction perpendicular to the imaging plane. In practice, that means it measures how well you can distinguish two structures that lie at different elevations within the slice, which are effectively across the beam’s cross-section. If the slice is thin, you can separate objects that are slightly one above the other; a thicker slice blends them together. So the key idea is resolving details in a direction perpendicular to the beam’s propagation. The other orientations describe axial (along the beam) or lateral directions, which are not what elevational resolution refers to.

Elevational resolution is about the thickness of the ultrasound beam in the direction perpendicular to the imaging plane. In practice, that means it measures how well you can distinguish two structures that lie at different elevations within the slice, which are effectively across the beam’s cross-section. If the slice is thin, you can separate objects that are slightly one above the other; a thicker slice blends them together. So the key idea is resolving details in a direction perpendicular to the beam’s propagation. The other orientations describe axial (along the beam) or lateral directions, which are not what elevational resolution refers to.