3 July 2001 Real-time retinal tracking for laser treatment planning and administration
Author Affiliations +
Proceedings Volume 4322, Medical Imaging 2001: Image Processing; (2001); doi: 10.1117/12.431010
Event: Medical Imaging 2001, 2001, San Diego, CA, United States
We propose a computerized system to accurately point laser to the diseased areas within the retina based on predetermined treatment planning. The proposed system consists of a fundus camera using red-free illumination mode interfaced to a computer that allows real-time capturing of video input. The first image acquired is used as the reference image for treatment planning. A new segmentation technique was developed to accurately discern the image features using deformable models. A grid of seed contours over the whole image is initiated and allowed to deform by splitting and/or merging according to preset criteria until the whole vessel tree is extracted. This procedure extracts the whole area of small vessels but only the boundaries of the large vessels. Correlating the image with a one-dimensional Gaussian filter in two perpendicular directions is used to extract the core areas of such vessels. Faster segmentation can be obtained for subsequent images by automatic registration to compensate for eye movement and saccades. Comparing the two sets of landmark points using a least-squares error provide an optimal transformation between the two point sets. This allows for real-time location determination and tracking of treatment positions.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nahed Solouma, Abou-Bakr M. Youssef, Yehia Badr, Yasser M. Kadah, "Real-time retinal tracking for laser treatment planning and administration", Proc. SPIE 4322, Medical Imaging 2001: Image Processing, (3 July 2001); doi: 10.1117/12.431010; https://doi.org/10.1117/12.431010

Image segmentation

Computing systems

Laser therapeutics


Image processing

Imaging systems


Back to Top