Which OCT feature does a line scan primarily report?

Which OCT feature does a line scan primarily report?

• A. Scan thickness
• B. Vessel density
• C. Color depth
• D. Motion artifacts

Answer: (A)

A line scan provides a depth profile along a single line across the tissue, so the primary information it reports is how thick a layer is between its upper and lower boundaries along that line. The OCT signal maps reflectivity versus depth, and the distance between the bright interfaces you see in that line corresponds to the thickness of the structure at that lateral position. Vessel density requires methods that track flow or vasculature (like OCT angiography), which isn’t what a line scan alone measures. Color depth isn’t an inherent OCT metric—images are typically grayscale and thickness is inferred from the depth profile. Motion artifacts can distort the scan but aren’t the feature the line scan reports; they’re potential issues to be managed.

A line scan provides a depth profile along a single line across the tissue, so the primary information it reports is how thick a layer is between its upper and lower boundaries along that line. The OCT signal maps reflectivity versus depth, and the distance between the bright interfaces you see in that line corresponds to the thickness of the structure at that lateral position. Vessel density requires methods that track flow or vasculature (like OCT angiography), which isn’t what a line scan alone measures. Color depth isn’t an inherent OCT metric—images are typically grayscale and thickness is inferred from the depth profile. Motion artifacts can distort the scan but aren’t the feature the line scan reports; they’re potential issues to be managed.