Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Ansari-Shahrezaei, S; Ergun, E; Stur, M.
Digital area measurement of fundus landmarks.
Graefes Arch Clin Exp Ophthalmol. 2006; 244(6):649-653
Doi: 10.1007/s00417-005-0189-y
Web of Science
PubMed
FullText
FullText_MUG
- Führende Autor*innen der Med Uni Graz
- Ansari Shahrezaei Siamak
- Altmetrics:
- Dimensions Citations:
- Plum Analytics:
- Scite (citation analytics):
- Abstract:
- To present and validate an image analysis technique for the calculation of the true projection area of fundus landmarks from a digital fundus image. The authors present the description, technical details and results of the study. Experimental study using a calibrated Gullstrand-type model eye with a scale of half circles in the centre of the artificial fundus. The axial length of the model eye was set to different values ranging from 21 mm to 29 mm, and the area of a half circle was calculated from digital fundus images with a magnification-calibrated image analysis program (UTHSCSA Image Tool). The calibration was based on Littmann's formula for correcting the magnification of fundus images. The maximum deviation of the calculated area size from the true fundus object area was -3.7% under myopic and +3.4% under hyperopic conditions. The 95% confidence interval for repeated area measurements was from +1.83 to -1.46%. The magnification-calibrated image analysis technique based on Littmann's formula is a non-invasive, accurate and reproducible tool for true area measurement of fundus landmarks.
- Find related publications in this database (using NLM MeSH Indexing)
- Calibration -
- Fundus Oculi -
- Humans -
- Image Processing, Computer-Assisted - methods
- Models, Biological -
- Find related publications in this database (Keywords)
- fundus landmarks
- image analysis
- fundus imaging