| 발표일자: |
2016년 11월 4일(금) ~ 11월 6일(일) |
| 발표번호: |
P(판넬)-011 |
| 발표장소: |
킨텍스 제2전시장 7B홀 |
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| SD-OCT에서 시신경 유두 중심 오차가 망막신경섬유층 지도에 미치는 영향 |
| (1) 한양대학교 의과대학 안과학교실
(2) 한양대학교 의과대학 안과학교실 한양대학교구리병원 안과
(3) 울산대학교 의과대학 서울아산병원 안과학교실 |
| 홍은희(1,2), 신중원(1,3), 성민철(1,2), 성경림(3), 엄기방(1) |
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목적 : To investigate the effect of optic disc center displacement on retinal nerve fiber layer (RNFL) measurement determined by spectral domain optical coherence tomography (SD-OCT).
방법 : The optic disc center was manipulated at 1-pixel intervals in horizontal, vertical, and diagonal directions. According to the manipulated optic disc center location, the RNFL thickness data were resampled: (1) at a 3.46-mm diameter circle; and (2) between a 2.5-mm diameter circle and 5.4-mm square. Error was calculated between the original and resampled RNFL measurements. The tolerable error threshold of the optic disc center displacement was determined by considering test-retest variability of SD-OCT. The unreliable zone was defined as an area with 10% or more variability.
결과 : The maximum tolerable error thresholds of optic disc center displacement on the RNFL thickness map were distributed from 0.042 to 0.09 mm in 8 directions. The threshold shape was vertically elongated. Clinically important unreliable zones were located: (1) at superior and inferior region in the vertical displacement; (2) at inferotemporal region in the horizontal displacement, and (3) at superotemporal or inferotemporal region in the diagonal displacement. The unreliable zone pattern and threshold limit varied according to the direction of optic disc displacement.
결론 : Optic disc center displacement had a considerable impact on whole RNFL thickness measurements. Understanding the effect of optic disc center displacement could contribute to reliable RNFL measurements.
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