Reproducibility of Anterior Chamber Angle Measurements Obtained with Anterior Segment Optical Coherence Tomography

2007 ◽  
Vol 48 (8) ◽  
pp. 3683 ◽  
Author(s):  
Sunita Radhakrishnan ◽  
Jovina See ◽  
Scott D. Smith ◽  
Winifred P. Nolan ◽  
Zheng Ce ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Angle Measurements ◽  
Chamber Angle

Reproducibility and agreement of four anterior segment-optical coherence tomography devices for anterior chamber angle measurements

2020 ◽  
Vol 258 (7) ◽  
pp. 1475-1481 ◽  
Author(s):  
Xiaojing Pan ◽  
Jyotsna Maram ◽  
Muneeswar G. Nittala ◽  
Brian A. Francis ◽  
Vikas Chopra ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Angle Measurements ◽  
Chamber Angle

scholarly journals Reproducibility of Scleral Spur Identification and Angle Measurements Using Fourier Domain Anterior Segment Optical Coherence Tomography

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Ricardo J. Cumba ◽  
Sunita Radhakrishnan ◽  
Nicholas P. Bell ◽  
Kundandeep S. Nagi ◽  
Alice Z. Chuang ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Interobserver Agreement ◽  
Anterior Segment ◽  
Correlation Coefficients ◽  
Fourier Domain ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Angle Measurements ◽  
Chamber Angle

Purpose. To evaluate intraobserver and interobserver agreement in locating the scleral spur landmark (SSL) and anterior chamber angle measurements obtained using Fourier Domain Anterior Segment Optical Coherence Tomography (ASOCT) images.Methods. Two independent, masked observers (SR and AZC) identified SSLs on ASOCT images from 31 eyes with open and nonopen angles. A third independent reader, NPB, adjudicated SSL placement if identifications differed by more than 80 μm. Nine months later, SR reidentified SSLs. Intraobserver and interobserver agreement in SSL placement, trabecular-iris space area (TISA750), and angle opening distance (AOD750) were calculated.Results. In 84% of quadrants, SR’s SSL placements during 2 sessions were within 80 μm in both theX- andY-axes, and in 77% of quadrants, SR and AZC were within 80 μm in both axes. In adjudicated images, 90% of all quadrants were within 80 μm, 88% in nonopen-angle eyes, and 92% in open-angle eyes. The intraobserver and interobserver correlation coefficients (with and without adjudication) were above 0.9 for TISA750 and AOD750 for all quadrants.Conclusions. Reproducible identification of the SSL from images obtained with FD-ASOCT is possible. The ability to identify the SSL allows reproducible measurement of the anterior chamber angle using TISA750 and AOD750.

Reproducibility of Anterior Chamber Angle Measurements with Anterior Segment Optical Coherence Tomography

2011 ◽  
Vol 52 (5) ◽  
pp. 2095 ◽  
Author(s):  
Annelie N. Tan ◽  
Loes D. C. Sauren ◽  
John de Brabander ◽  
Tos T. J. M. Berendschot ◽  
Valéria Lima Passos ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Angle Measurements ◽  
Chamber Angle

Evaluation of the Narrow Anterior Chamber Angle by Anterior Segment Optical Coherence Tomography

2016 ◽  
Vol 57 (2) ◽  
pp. 87-91 ◽  
Author(s):  
Jie Lan ◽  
Dapeng Sun ◽  
Khatoon Alabdulrasool ◽  
Hassan Ebrahim Yusuf ◽  
Lu Zhang
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Chamber Angle

Anterior Chamber Angle Measurement with Anterior Segment Optical Coherence Tomography: A Comparison between Slit Lamp OCT and Visante OCT

2008 ◽  
Vol 49 (8) ◽  
pp. 3469 ◽  
Author(s):  
Christopher Kai-shun Leung ◽  
Haitao Li ◽  
Robert Neal Weinreb ◽  
Jing Liu ◽  
Carol Yim Lui Cheung ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Angle Measurement ◽  
Optical Coherence ◽  
Slit Lamp ◽  
Anterior Chamber Angle ◽  
Chamber Angle

Assessment of the Anterior Chamber Angle in Patients with Nanophthalmos: An Anterior Segment Optical Coherence Tomography Study

2013 ◽  
Vol 38 (5) ◽  
pp. 563-568 ◽  
Author(s):  
Necip Kara ◽  
Okkes Baz ◽  
Hasan Altinkaynak ◽  
Cigdem Altan ◽  
Ahmet Demirok
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Chamber Angle

scholarly journals Anterior Chamber Angle Measurements Using Schwalbe’s Line With High-resolution Fourier-Domain Optical Coherence Tomography

2013 ◽  
Vol 22 (9) ◽  
pp. 684-688 ◽  
Author(s):  
Bing Qin ◽  
Brian A. Francis ◽  
Yan Li ◽  
Maolong Tang ◽  
Xinbo Zhang ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
High Resolution ◽  
Anterior Chamber ◽  
Fourier Domain ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Angle Measurements ◽  
Chamber Angle

scholarly journals Visualization of Anterior Chamber Angle Structures With Scattering- and Polarization-Sensitive Anterior Segment Optical Coherence Tomography

2021 ◽  
Vol 10 (14) ◽  
pp. 29
Author(s):  
Yuta Ueno ◽  
Haruhiro Mori ◽  
Keita Kikuchi ◽  
Masahiro Yamanari ◽  
Tetsuro Oshika
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Chamber Angle

scholarly journals Anterior chamber angle imaging with swept-source optical coherence tomography: comparison between CASIAII and ANTERION

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Poemen Pui-man Chan ◽  
Gilda Lai ◽  
Vivian Chiu ◽  
Anita Chong ◽  
Marco Yu ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Angle Closure ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Scan Pattern ◽  
Chamber Angle

Abstract This study compared the test–retest variabilities and measurement agreement of anterior chamber angle (ACA) dimensions measured by two anterior segment swept-source optical coherence tomography (SS-OCT)—the ANTERION (Heidelberg Engineering, Heidelberg, Germany) and CASIAII (Tomey, Nagoya, Japan). Thirty-eight subjects, 18 patients with primary angle closure and 20 healthy participants with open angles, were included. The mean age was 54.7 ± 15.8 years (range: 26–75 years). One eye of each subject was randomly selected for anterior segment imaging by ANTERION and CASIAII, using the same scan pattern (6 evenly spaced radial scans across the anterior segment for three times) in the same visit. The between- and within-instrument agreement and repeatability coefficients of angle open distance (AOD500), trabecular-iris space area (TISA500), lens vault (LV), scleral spur-scleral spur distance (SSD), anterior chamber depth (ACD), and pupil diameter (PD) were measured. The anterior and posterior boundaries of the cornea, iris, and lens were automatically segmented by the SS-OCT instruments; the scleral spur was manually located by a single masked observer. There were significant differences between ANTERION and CASIAII measurements; the SSD, PD, and ACD were smaller whereas AOD500 and TISA500 were greater in ANTERION compared with CASIAII (P < 0.001). Anterior segment measurements obtained from the two SS-OCT instruments showed strong associations (R2 ranged between 0.866 and 0.998) although the between-instrument agreement was poor; the spans of 95% limits of between-instrument agreement were ≥ 1.5-folds than the within-instrument agreement for either instrument. Whereas both SS-OCT instruments showed low test–retest measurement variabilities, the repeatability coefficients of AOD500, TISA500, ACD, and PD were slightly smaller for CASIAII than ANTERION (P ≤ 0.012).

Sign in / Sign up

Export Citation Format

Share Document