How should you correct a line scan that is tilted at an angle during OCT imaging?

How should you correct a line scan that is tilted at an angle during OCT imaging?

• A. Move the head of the OCT camera horizontally using the joystick.
• B. Tilt the camera more steeply to compensate.
• C. Use post-processing deskew algorithm.
• D. Increase the scan speed to reduce tilt.

Answer: (A)

When a line scan is tilted, the goal is to realign the imaging plane with the tissue so the scan crosses the region of interest in a perpendicular or properly oriented way. The direct way to do that is to move the camera head horizontally using the joystick. This physical adjustment reorients the beam path, eliminating the tilt from the acquisition and giving a clean, undistorted cross-sectional image. Increasing the scan speed doesn’t fix the geometry and can introduce motion artifacts, while tilting the camera more would worsen the tilt. Post-processing deskew can compensate after data are collected, but the best practice is to correct the tilt at acquisition by realigning the camera position.

When a line scan is tilted, the goal is to realign the imaging plane with the tissue so the scan crosses the region of interest in a perpendicular or properly oriented way. The direct way to do that is to move the camera head horizontally using the joystick. This physical adjustment reorients the beam path, eliminating the tilt from the acquisition and giving a clean, undistorted cross-sectional image. Increasing the scan speed doesn’t fix the geometry and can introduce motion artifacts, while tilting the camera more would worsen the tilt. Post-processing deskew can compensate after data are collected, but the best practice is to correct the tilt at acquisition by realigning the camera position.