[Retinal blood vessel measurement using a line sensor].
Retinal blood vessel diameters were measured with a line sensor and a fundus camera. The measurement time was 1.0 second and the measured value was determined in about 0.1 second. The measured values were compared with those obtained by measuring fundus photographs under a microscope. Opaque lines on a film were used as model vessels and the widths of the lines were measured. The reproducibility was 0.196 +/- 0.253 (mean +/- standard deviation)% and significantly better than that of the microscopic method (0.563 +/- 0.321%). The correlation between the measured values and the actual values which were obtained by directly measuring the film with a microscope was 0.999. The diameters of 17 retinal arteries (diameter 43.3-109. 4 microns) and 196 retinal veins (diameter 35.6-193.2 microns) from 35 eyes of 20 normal volunteers were measured. The reproducibility was 1.72 +/- 1.93% in retinal arteries and 2.11 +/- 2.79% in veins, which tended to be smaller than in the microscope method. The correlation between the values obtained by the line sensor method and those measured by microscope was 0.797 in retinal arteries and 0.915 in veins.
Suzuki
Y
Y
Department of Ophthalmology, Kanto-Teishin Hospital, Tokyo, Japan.
Yoshisuji
M
M
D000328:Adult; D006801:Humans; D008853:Microscopy; D019721:Ophthalmoscopes; D015203:Reproducibility of Results; D012161:Retinal Artery / Q000033:anatomy & histology; D012169:Retinal Vein / Q000033:anatomy & histology; D012171:Retinal Vessels / Q000033:anatomy & histology*