J Korean Ophthalmol Soc > Volume 56(2); 2015 > Article
Journal of the Korean Ophthalmological Society 2015;56(2):168-173.
DOI: https://doi.org/10.3341/jkos.2015.56.2.168    Published online February 15, 2015.
Measurement of Orbital Volume from Facial CT Scans Using a Semi-Automatic Computer Program.
Jeong Han Choi, In Ki Park, Sam Jin Choi, Jae Ho Shin
1Department of Ophthalmology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea. pbloadsky@naver.com
2Department of Ophthalmology, Kyung Hee University Medical Center, Kyung Hee University School of Medicine, Seoul, Korea.
3Department of Bioengineering, Kyung Hee University School of Medicine, Seoul, Korea.
얼굴 전산화 단층촬영 사진을 이용한 안와 용적의 측정
최정한1⋅ 박인기2⋅최삼진3⋅신재호1
경희대학교 의과대학 강동경희대학교병원 안과학교실1, 경희대학교 의과대학 경희의료원 안과학교실2, 경희대학교 의과대학 의공학교실3
Abstract
PURPOSE
To measure the orbital volume from facial CT scans using a semi-automatic computer program. METHODS: Axial and coronal slices of 35 facial CT scans were used to measure the orbital volume. The cross-sectional area was determined from each slice using a semi-automated computer program (MATLAB 2009a). Next, the orbital volume was calculated from serial reconstruction of the cross-sections. RESULTS: The measured value in males was 26.34 +/- 3.09 cm3 in the right orbit and 26.30 +/- 3.21 cm3 in the left orbit from axial scans, and 26.58 +/- 2.76 cm3 in the right orbit and 26.59 +/- 2.75 cm3 in the left orbit from coronal scans. In females, the values were 23.84 +/- 2.29 cm3 in the right orbit and 23.89 +/- 2.33 cm3 in the left orbit from axial scans, and 24.06 +/- 2.90 cm3 in the right orbit and 24.10 +/- 2.82 cm3 in the left orbit from coronal scans. There was high positive correlation (r = +0.832, p = 0.0001) in measured orbital volume between axial and coronal scans. CONCLUSIONS: The orbital volume measurement from facial CT scans using a semi-automatic computer program is very useful. This method should prove useful in further studies examining the correlation of orbital volume variation in many ophthalmologic disorders.
Key Words: Facial CT;Orbital volume;Volume measurement


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