Tracking optical coherence tomography.
An experimental tracking optical coherence tomography (OCT) system has been clinically tested. The prototype instrument uses a secondary sensing beam and steering mirrors to compensate for eye motion with a closed-loop bandwidth of 1 kHz and tracking accuracy, to within less than the OCT beam diameter. The retinal tracker improved image registration accuracy to <1 transverse pixel (<60 microm). Composite OCT images averaged over multiple scans and visits show a sharp fine structure limited only by transverse pixel size. As the resolution of clinical OCT systems improves, the capability to reproducibly map complex structures in the living eye at high resolution will lead to improved understanding of disease processes and improved sensitivity and specificity of diagnostic procedures.
Physical Sciences, Inc., 20 New England Business Center, Andover, Massachusetts 01810, USA. ferguson@psicorp.com
R Daniel
RD
Ferguson
Daniel X
DX
Hammer
Lelia Adelina
LA
Paunescu
Siobahn
S
Beaton
Joel S
JS
Schuman
D005133:Eye Movements; D005246:Feedback; D005901:Glaucoma / Q000473:pathology*; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation / Q000379:methods*; D019721:Ophthalmoscopes; D009887:Ophthalmoscopy / Q000379:methods*; D010865:Pilot Projects; D012160:Retina / Q000473:pathology*; D041623:Tomography, Optical Coherence / Q000295:instrumentation / Q000379:methods*