ABSTRACT

Purpose:

To demonstrate the image artifacts types, frequency and clinical importance in the macula and optic disc maps obtained with Cirrus HD optical coherence tomography (OCT).

Materials & Methods:

Macular maps of 189 and optic disc maps of 68 individuals were evaluated. Artifacts detected in macular measurements associated with age-related macular degeneration (AMD), diabetic macular edema (DME) and other macula pathologies were evaluated in terms of their frequency and clinical significance. The frequency and clinical significance of artifacts in retinal nerve fiber layer (RNFL) and optic disc head measurements in individuals with/without glaucoma were also assessed. Any artifact resulting in an error that is more than 50 µm or 10% of true retinal thickness were considered as clinical significance.

Results:

Seven types of artifacts associated with macula measurements, 3 types associated with optic disc and RNFL measurements were presented. The most frequent artifact type associated with AMD (63 patients, artifact frequency 42%) and DME (69 patients with artifact frequency 35%) were the misidentification of the inner and outer retinal layers. 65% of the artifacts in AMD maps and 62% of the DME maps were clinically significant. Foveal duplication was the most frequent artifact type in the macular measurements of 34 healthy subjects with 20.5% frequency. The line scatter artifact (44%) was detected as the most frequent artifact associated with RNFL maps.

Conclusions:

Macular and RNFL thickness analyzes are important parameters in determining the treatment and follow-up plan of many ocular pathologies. In this manner, OCT artifacts can affect these parameters and are common. At this point, ophthalmologists should be careful.


CONTACT DETAILS

 

Mustafa GOK
Ordu Universty Faculty of Medicine
Ordu
Turkey
Email : drmgok81@gmail.com
Cell Phone: +905052847747
Work Phone: +904522252338