Transcript Speckle Noise Reduction in Optical Coherent Tomography

Speckle Noise Reduction in
Optical Coherence Tomography
By:
Marisse Foronda
Rishi Matani
Hardik Mehta
Arthur Ortega
Background
 Minimally-Invasive to Non-Invasive imaging system
 Clinically used
 High Resolution alternate to ultrasound imaging
 One significant problem is speckle formation
Speckle
tissue
modulated
wave fronts
multiple
forward
scatter
wave fronts
multiple
back
scatter
sample volume
Speckle Reduction
 Current methods to reduce speckle require recording and
averaging many images together or a lot of post-processing
 Deformable Mirror was used to decrease speckle
 Results are favorable
 Clear contrast between layers
 Layers are distinguishable
Goal of Project
 Speckle Reduction
 No extra recording time
required
 By averaging different
patterns
 Previous study showed
reduction
 More patterns is similar to
averaging more images
Goal of Project

Deformable Mirror
 12 x 12 array
 3.5  m stroke volume
 500Hz frame update
Deformable Mirror