Grayscale and Proportion-Corrected Optical Coherence Tomography Images
- Resource Type
- Authors
- Jeffrey M. Liebmann; R. Ritch; Sek Tien Hoh; Hiroshi Ishikawa; Rabia Gürses-Özden; Dou Hl
- Source
- Ophthalmic Surgery, Lasers and Imaging Retina. 31:223-228
- Subject
- Scanner
genetic structures
medicine.diagnostic_test
business.industry
Retinal
computer.file_format
Grayscale
Reflectivity
eye diseases
chemistry.chemical_compound
Software
Optics
chemistry
Optical coherence tomography
Medicine
Computer vision
sense organs
Image file formats
Artificial intelligence
Tomography
business
computer
- Language
- ISSN
- 2325-8179
2325-8160
* BACKGROUND AND OBJECTIVE: The commercially available optical coherence tomography (OCT) scanner displays images in a pre-set window regardless of the projected scan length on the retinal surface. The aim of this study was to demonstrate the true dimensions of proportion-corrected OCT images and the additional information present in grayscale images. * MATERIALS AND METHODS: OCT raw data were exported to an IBM-compatible PC and processed to show grayscale and proportion-corrected images using an automated software of our own design. * RESULTS: Eyes with cystoid macular edema and retinal pigment detachment were analyzed. Grayscale images showed a finer gradation of signal reflectance. Scan lengths of 2, 4, 6, and 8 mm on the retinal surface showed different qualitative appearances using proportion-corrected software from the printed or onscreen images. * CONCLUSIONS: Grayscale OCT images can be used to demonstrate additional information not present in false-color images. The disparity between the standard OCT image format and proportion-corrected images emphasizes the need for quantitative rather than qualitative evaluation of retinal dimensions and internal reflectance. [Ophthalmic Surg Lasers 2000;3 1:223-228]