Abstract
Lesion size induced by laser photocoagulation is controlled in real time based on a two-dimensional reflectance image recorded by a CCD array during lesion formation. A feedback system using components of the reflectance image achieves uniform lesions by compensating for light absorption variability in biological media. Lesions are formed in a phantom by an argon laser to simulate retinal photocoagulation. The tissue model consists of a thin absorptive layer covered by a clear albumin protein layer. Results show a low variance in the sizes of the lesions (diameter or depth) produced in different irradiation conditions and the ability to produce lesions of a predefined size in varying illumination conditions.
Original language | English |
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Pages (from-to) | 1200-1209 |
Number of pages | 10 |
Journal | Applied Optics |
Volume | 32 |
Issue number | 7 |
DOIs | |
State | Published - Mar 1993 |
Keywords
- Feedback
- Laser
- Photocoagulation
- Reflectance