[Measuring retinal vascular diameter using the scanning laser ophthalmoscope and computer. Initial results].
The diameter of the large retinal vessels is an important factor in retinal microcirculation. A system configuration was developed that uses SLO images to measure the diameter of retinal branch vessels off-line. The place for measurement is defined in the image by the investigator, and the diameter is measured automatically. The mean standard deviation of the diameter of arterial vessels was 2.37% and for veins 3.43% by repeat measurement in sequential pictures by optimal scanner settings. The reproduction of vessel diameters was unsatisfactorily for repeat examinations. The course of these results may be changes in the fundus image connected with changes in the position of the scanner-bulbus (e.g., new examination, poor fixation). The scanner-bulbus position is not yet precisely defined and not reproducible enough.
Nagel
E
E
Universitäts-Augenklinik Jena.
Vilser
W
W
Lindloh
C
C
Klein
S
S
D000328:Adult; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008297:Male; D008838:Microcomputers; D019721:Ophthalmoscopes; D012016:Reference Values; D012171:Retinal Vessels / Q000033:anatomy & histology*; D014655:Vascular Resistance / Q000502:physiology
Messung retinaler Gefässdurchmesser mittels Scanning-Laser-Ophthalmoskop und Computer. Erste Ergebnisse.