Comparison of retinal vessel measurements in digital vs film images.

Kleins Lab // Publications // Nov 01 2006

PubMed ID: 17056378

Author(s): Mosher A, Klein BE, Klein R, Knudtson MD, Ferrier NJ. Comparison of retinal vessel measurements in digital vs film images. Am J Ophthalmol. 2006 Nov;142(5):875-8. PMID 17056378

Journal: American Journal Of Ophthalmology, Volume 142, Issue 5, Nov 2006

PURPOSE To compare central retinal artery equivalents (CRAE) and central retinal vein equivalents (CRVE) from vessels measured from images captured with a digital camera and digitized images taken with a film camera.

DESIGN Comparison of techniques.

METHODS

SETTING Clinic.

PATIENTS A total of 75 eyes of 48 adults.

OBSERVATION PROCEDURES Gradings of retinal vessel diameters from images produced by using two photographic techniques: directly from a 45 degrees digital camera and digitized by scanning from a 30 degrees film-based camera.

MAIN OUTCOME MEASURE Differences in CRAE and CRVE from two types of images.

RESULTS CRAE and CRVE were highly comparable between the two techniques with correlation coefficients of 0.88 and 0.87, respectively.

CONCLUSION Estimates of CRAE and CRVE from measurements taken from digitally captured and digitized film-based images were highly comparable. It is likely that inferences about factors associated with retinal vessel diameters will be unbiased by the method of imaging.