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Spatial Compounding Algorithm for Speckle Reduction of Dynamic Focus OCT Images

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6 Author(s)
Avanaki, M.R.N. ; Neurosciences & Med. Image Comput. Group, Univ. of Kent, Canterbury, UK ; Cernat, R. ; Tadrous, P.J. ; Tatla, T.
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Optical coherence tomography is capable of imaging the microstructures within tissues. To preserve the transverse resolution at all imaging depths, we implement a dynamic focusing scheme. To improve the quality of images further, a simple speckle reduction scheme is employed which uses the vibration introduced by the translation stage used for axial scanning. A spatial compounding technique is developed based on co-registration followed by an averaging algorithm. We conclude that the degree of speckle reduction achieved is worth the expense of more complicated processing required.

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Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 15 )