Anterior segment imaging: Fourier-domain optical coherence tomography versus time-domain optical coherence tomography

作者：Wylegala Edward; Teper Slawornir; Nowinska Anna K^*; Milka Michal; Dobrowolski Dariusz

来源：Journal of Cataract and Refractive Surgery, 2009, 35(8): 1410-1414.

DOI：10.1016/j.jcrs.2009.03.034

PURPOSE: To compare anterior segment measurements and morphology of 2 optical coherence tomography (OCT) systems.
SETTING: Department of Ophthalmology, District Railway Hospital, and the Nursing Department and Social Medical Issues, Health Care Division, Silesian Medical University, Katowice, Poland.
METHODS: In normal eyes and in eyes with corneal and trabecular-iris angle disorders, the central corneal thickness (CCT), trabecular-iris angle, and angle-opening distance at the nasal and temporal angles were measured 3 times (luring 1 visit using the Visante time-domain OCT system and the RTVue-100 Fourier-domain corneal anterior module OCT system. Anterior segment morphology was assessed and compared.
RESULTS: Fifty-four eyes were evaluated. The mean values ( /- SD) by time-domain OCT and Fourier-domain OCT were, respectively, automatic CCT, 535 /- 33.07 mu m and 538 /- 31.82 mu m; manual CCT, 545 /- 30.91 mu m and 542 /- 30.57 mu m; nasal trabecular-iris angle, 34.7 /- 9.5 degrees and 35.2 /- 8.9 degrees; temporal trabecular-iris angle, 35.3 /- 8.5 degrees and 35.5 /- 9 degrees; nasal angle-opening distance, 435 /- 95 mu m and 444 /- 98 mu m; and temporal angle-opening distance, 443 /- 103 mu m and 452 /- 99 mu m. There was no significant difference between mean values, and they were highly correlated. On morphologic analysis, time-domain OCT had lower resolution; however, all anterior chamber structures were visible on 1 image. Fourier-domain OCT provided precise information about small areas of the anterior chamber.
CONCLUSION: Fourier-domain OCT provided accurate anterior eye segment measurements that agreed with those obtained with time-domain OCT.

• 出版日期2009-8