Elevational resolution refers to resolution in which direction?

Elevational resolution refers to resolution in which direction?

• A. Axial direction
• B. Elevational direction
• C. Lateral direction
• D. Temporal direction

Answer: (B)

Elevational resolution measures how well we can separate two structures across the slice thickness, i.e., in the direction perpendicular to the imaging plane. In ultrasound (and similar imaging), the image is a thin plane, and resolution is described in three spatial directions: along the beam (axial), across the plane within the plane (lateral), and perpendicular to the plane (elevational). A thinner elevational dimension reduces partial-volume effects and improves our ability to distinguish structures that lie out of the plane. Temporal direction isn’t a spatial axis, so it describes time rather than a spatial separation. So elevational resolution is the out-of-plane, elevational direction.

Elevational resolution measures how well we can separate two structures across the slice thickness, i.e., in the direction perpendicular to the imaging plane. In ultrasound (and similar imaging), the image is a thin plane, and resolution is described in three spatial directions: along the beam (axial), across the plane within the plane (lateral), and perpendicular to the plane (elevational). A thinner elevational dimension reduces partial-volume effects and improves our ability to distinguish structures that lie out of the plane. Temporal direction isn’t a spatial axis, so it describes time rather than a spatial separation. So elevational resolution is the out-of-plane, elevational direction.