Master thesis
My master thesis at the BC Cancer Research Center explored a new applicaiton of DMDI (Dual-beam Maually-actuated Distortion-corrected Imaging) and focused on automated distortion correction.
My master thesis at the BC Cancer Research Center explored a new applicaiton of DMDI (Dual-beam Maually-actuated Distortion-corrected Imaging) and focused on automated distortion correction.
Start date: 11.09.2017
Defense date: 20.03.2018
Institutions: ETH Zurich and BC Cancer Research Center
Team: Independent with 2 supervisors
Publication: Opt. Express 26, 18758-18772 (2018)
Skills and tools used: image processing, reconstruction, and distortion correction using MATLAB and FIJI, imaging probes and scanners, en face OCT imaging, optical theory, optical set up and splicing, design and construction, publication and conference process.
We recently demonstrated a new two-dimensional imaging paradigm called dual-beam manually actuated distortion-corrected imaging (DMDI). This technique uses a single mechanical scanner and two spatially separated beams to determine relative sample velocity and simultaneously corrects image distortions due to manual actuation. DMDI was first demonstrated using a rotating dual-beam micromotor catheter. Here, we present a new implementation of DMDI using a single axis galvanometer to scan a pair of beams in approximately parallel lines onto a sample. Furthermore, we present a method for automated distortion correction based on frame co-registration between images acquired by the two beams. Distortion correction is possible for manually actuated motion both perpendicular and parallel to the galvanometer-scanned lines. Using en face OCT as the imaging modality, we demonstrate DMDI and the automated distortion correction algorithm for imaging a printed paper phantom, a dragon fruit, and a fingerprint.
