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Suboptimal image focus broadens retinal vessel caliber measurement
- Source :
- Investigative ophthalmologyvisual science. 52(12)
- Publication Year :
- 2011
-
Abstract
- PURPOSE Studies have used central retinal arteriolar (CRAE) and central retinal venular (CRVE) calibers, measured from images produced with computerized image analysis, to detect risk factors for systemic diseases. The authors explored suboptimal image focus as a possible contributing factor to artificially larger vascular caliber measurements. METHODS From the reading center image collections, 30 digital retinal images were selected for optimum quality. Image analysis software was used to derive nine progressively blurred versions of the originals. IVAN measurement software was used to measure CRAE and CRVE in the original and the blurred series derived from them. To check the adequacy of the simulation, progressively defocused series of images were taken of several volunteers. RESULTS For CRAE, each level of simulated blurring produced a statically significant increase in apparent vessel caliber from the original (P
- Subjects :
- medicine.medical_specialty
genetic structures
Wilcoxon signed-rank test
Databases, Factual
Retinal Artery
Image processing
chemistry.chemical_compound
Retinal Diseases
Risk Factors
Ophthalmology
medicine
Image Processing, Computer-Assisted
Photography
Humans
Computer Simulation
Image analysis
Mathematics
Suboptimal Image
Retinal
Retinal Vein
eye diseases
Retinal vessel
chemistry
Caliber
Calibration
Focus (optics)
Software
Subjects
Details
- ISSN :
- 15525783
- Volume :
- 52
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Investigative ophthalmologyvisual science
- Accession number :
- edsair.doi.dedup.....1ecafe362dce01ca43fa9b24bb36ddc1