By Pei-Gee Peter Ho (ed.)
ISBN-10: 9533072288
ISBN-13: 9789533072289
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Sample text
As a result, a cross-sectional view of the structure similar to a histology section is obtained. OCT can be used for retinal imaging and anterior segment imaging. The OCT for ophthalmic examination is similar to a slit lamp for anterior segment imaging and a fundus camera for retinal imaging. The instrumentation includes a video display for operator viewing of the anterior segment or fundus while obtaining the OCT images and a simultaneous computer display of the tomograms. Images are stored via computer for the diagnostic record (Puliafito, 1996).
Optical coherence tomography background The clinical potential of OCT technology in ophthalmology was originally recognized in the early 1990s. , 1996). This imaging technique generates a cross-sectional image by recording axial reflectance profiles while the transverse position of the optical beam on the sample is scanned. Thus, the longitudinal location of tissue structures are determined by measuring the time-of-flight delays of light backscattered from these structures. The optical delays are measured by low coherence interferometry.
Another limitation of OCT technology has been the difficulty in accurately localizing the cross-sectional images and correlating them with a conventional en face view of the fundus. One way to localize and visually interpret the images would be to integrate a scanning laser ophthalmoscope (SLO) into the OCT, thereby mapping OCT pixels to the conventional en face view of the SLO. , 2004). The system simultaneously produces SLO and OCT images that are created through the same optical path, and therefore correspond pixel to pixel.
IMAGE SEGMENTATION by Pei-Gee Peter Ho (ed.)
by Christopher
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