Coherent artifacts in optical coherence tomography (OCT) images can severely degrade image quality by introducing false targets if no targets are present at the artifact locations. Coherent artifacts can also add constructively or destructively to the targets that are present at the artifact locations. This constructive or destructive interference will result in cancellation of the true targets or in display of incorrect echo amplitudes of the targets. We introduce the use of a nonlinear deconvolution algorithm, CLEAN, to cancel coherent artifacts in OCT images of extracted human teeth. The results show that CLEAN can reduce the coherent artifacts to the noise background, sharpen the air–enamel and enamel–dentin interfaces, and improve the image contrast.
© 2001 Optical Society of America
(170.1850) Medical optics and biotechnology : Dentistry
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.4500) Medical optics and biotechnology : Optical coherence tomography
Daqing Piao, Quing Zhu, Niloy K. Dutta, Shikui Yan, and Linda L. Otis, "Cancellation of Coherent Artifacts in Optical Coherence Tomography Imaging," Appl. Opt. 40, 5124-5131 (2001)