Which resolution is located perpendicular to the scan plane and equals the section thickness?

Which resolution is located perpendicular to the scan plane and equals the section thickness?

• A. Elevation Resolution
• B. Detail Resolution
• C. Far Zone
• D. Focal Point

Answer: (A)

In ultrasound imaging, resolution comes in three directions: axial (along the beam), lateral (across the scan line within the image plane), and elevational (perpendicular to the scan plane). The elevational, or slice-thickness, resolution describes how well two structures that lie one above the other in the direction perpendicular to the image plane can be distinguished. It is essentially the thickness of the imaging slice, so the resolution in this direction equals the section thickness. This is why the correct choice is the elevation resolution. Far zone refers to the beam’s far field, not a resolution type; the focal point is a location where the beam converges and influences resolution but is not a resolution category itself; “detail resolution” isn’t the standard term for this dimension.

In ultrasound imaging, resolution comes in three directions: axial (along the beam), lateral (across the scan line within the image plane), and elevational (perpendicular to the scan plane). The elevational, or slice-thickness, resolution describes how well two structures that lie one above the other in the direction perpendicular to the image plane can be distinguished. It is essentially the thickness of the imaging slice, so the resolution in this direction equals the section thickness. This is why the correct choice is the elevation resolution. Far zone refers to the beam’s far field, not a resolution type; the focal point is a location where the beam converges and influences resolution but is not a resolution category itself; “detail resolution” isn’t the standard term for this dimension.