|
KMID : 0360220190600030210
|
|
Journal of the Korean Ophthalmological Society
2019 Volume.60 No. 3 p.210 ~ p.216
|
|
|
Semi-automatic Measurement of Ocular Volume from Facial Computed Tomography and Correlation with Axial Length
|
|
Chung Jun-Kyu
Park In-Ki
Choi Sam-Jin
Shin Jae-Ho
|
|
|
Abstract
|
|
|
Purpose: To measure the ocular volume from facial computed tomography (CT) scans using a semi-automatic computer program, and to analyze possible correlations between the axial length and ocular volume using regression analysis.
Methods: Forty eyes from 20 facial CT scans were used to measure the ocular volumes. The cross-sectional ocular areas were calculated using a semi-automatic program based on MATLAB r2009a (MathWorks, Inc., Natick, MA, USA), and the ocular volumes were calculated from serial cross-sectional areas. The axial lengths were measured by A-scan ultrasound. Statistical analysis including regression analysis was used to determine possible correlations between the ocular volumes and axial lengths.
Results: The mean ocular volumes measured in males and females were 7.16 ± 1.80 cm3 and 7.24 ± 3.38 cm3, respectively. The mean axial lengths measured in males and females were 23.47 ± 0.69 mm and 23.23 ± 1.64 mm, respectively. There were positive correlations using Pearson’s correlation coefficient and the partial correlation coefficient adjusted by axial length. Using regression analysis, the following statistically significant equation was derived: (ocular volume [cm3] = 0.0056558 × axial length3 [mm3] ? 0.1798106 × axial length2 [mm2] + 32.9008570 [p < 0.001, R2 = 0.384]).
Conclusions: The ocular volume measurement tool in this study was noninvasive and very useful, without special equipment. Accurate estimation of ocular volumes by a statistical equation was feasible, and these findings may be helpful in further study of various ocular diseases and in predicting preoperative and postoperative ocular volumes.
|
|
|
KEYWORD
|
|
|
Axial length, Facial computed tomography, Ocular volume, Volume measurements
|
|
|
FullTexts / Linksout information
|
|
 
|
|
|
Listed journal information
|
|
  
|
|