Assessment of artifacts and reproducibility across spectral- and time-domain optical coherence tomography devices.
OBJECTIVE
To report the frequency of optical coherence tomography (OCT) scan artifacts and to compare macular thickness measurements, interscan reproducibility, and interdevice agreeability across 3 spectral-domain (SD) OCT (also known as Fourier domain; Cirrus HD-OCT, RTVue-100, and Topcon 3D-OCT 1000) devices and 1 time-domain (TD) OCT (Stratus OCT) device.


METHODS
Prospective, noncomparative, noninterventional case series.


METHODS
Fifty-two patients seen at the New England Eye Center, Tufts Medical Center Retina Service, between February and August 2008.


METHODS
Two scans were performed for each of the SD OCT protocols: Cirrus macular cube 512 x 128 (software version 3.0; Carl Zeiss Meditec, Inc., Dublin, CA), RTVue (E)MM5 and MM6 (software version 3.5; Optovue, Inc., Fremont, CA), Topcon 3D Macular and Radial (software version 2.12; Topcon, Inc., Paramus, NJ), in addition to 1 TD OCT scan via Stratus macular thickness protocol (software version 4.0; Carl Zeiss Meditec, Inc.). Scans were inspected for 6 types of OCT scan artifacts and were analyzed. Interscan reproducibility and interdevice agreeability were assessed by intraclass correlation coefficients (ICCs) and Bland-Altman plots, respectively.


METHODS
Optical coherence tomography image artifacts, macular thickness, reproducibility, and agreeability.


RESULTS
Time-domain OCT scans contained a significantly higher percentage of clinically significant improper central foveal thickness (IFT) after manual correction (11-mum change or more) compared with SD OCT scans. Cirrus HD-OCT had a significantly lower percentage of clinically significant IFT (11.1%) compared with the other SD OCT devices (Topcon 3D, 20.4%; Topcon Radial, 29.6%; RTVue (E)MM5, 42.6%; RTVue MM6, 24.1%; P = 0.001). All 3 SD OCT devices had central foveal subfield thicknesses that were significantly more than that of TD OCT after manual correction (P<0.0001). All 3 SD OCT devices demonstrated a high degree of reproducibility in the central foveal region (ICCs, 0.92-0.97). Bland-Altman plots showed low agreeability between TD and SD OCT scans.


CONCLUSIONS
Out of all OCT devices analyzed, cirrus HD-OCT scans exhibited the lowest occurrence of any artifacts (68.5%), IFT (40.7%), and clinically significant IFT (11.1%), whereas Stratus OCT scans exhibited the highest occurrence of clinically significant IFT. Further work on improving segmentation algorithm to decrease artifacts is warranted.
Ho
Joseph
J
New England Eye Center, Tufts Medical Center, Boston, MA 02111, USA.
Sull
Alan C
AC
Vuong
Laurel N
LN
Chen
Yueli
Y
Liu
Jonathan
J
Fujimoto
James G
JG
Schuman
Joel S
JS
Duker
Jay S
JS
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016477:Artifacts; D003951:Diagnostic Errors; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation*; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D015203:Reproducibility of Results; D012160:Retina / Q000473:pathology*; D012164:Retinal Diseases / Q000175:diagnosis*; D013997:Time Factors; D041623:Tomography, Optical Coherence