Automatic calibration systems and methods of use
The disclosed automatic calibration systems and methods provide a repeatable way to detect internal catheter reflections and to shift the internal catheter reflections to calibrate an image.
1. A method for automatic calibration, comprising:
performing an initial calibration of a catheter, based on internal catheter reflections that are stable in depth and consistent in intensity throughout the 360 degree rotation of the catheter, for a calibration position, the calibration including:
averaging an OCT image frame to selectively enhance high intensity features;
comparing a value of the image features to a pre-calibrated value; and
shifting the OCT image based on the comparison;
monitoring the internal catheter reflections of the calibration position;
determining if the calibration position needs updating on an image frame; and
updating the calibration position on a frame-by-frame basis.
2. The method of claim 1 , wherein the image frame is an A-scan.
3. The method of claim 1 , wherein the image frame includes a set of image frames.