NIH ImageJ and Slice-O-Matic Computed Tomography Imaging Software to Quantify Soft Tissue
Article first published online: 6 SEP 2012
2007 North American Association for the Study of Obesity (NAASO)
Volume 15, Issue 2, pages 370–376, February 2007
How to Cite
Irving, B. A., Weltman, J. Y., Brock, D. W., Davis, C. K., Gaesser, G. A. and Weltman, A. (2007), NIH ImageJ and Slice-O-Matic Computed Tomography Imaging Software to Quantify Soft Tissue. Obesity, 15: 370–376. doi: 10.1038/oby.2007.573
- Issue published online: 6 SEP 2012
- Article first published online: 6 SEP 2012
- Received for review May 17, 2006, Accepted in final from September 21, 2006
- skeletal muscle;
- body fat distribution;
- subcutaneous adipose tissue;
- visceral fat;
- body composition
Objective: To compare reliability and limits of agreement of soft tissue cross-sectional areas obtained using Slice-O-Matic and NIH ImageJ medical imaging software packages.
Research Methods and Procedures: Abdominal and midthigh images were obtained using single-slice computed tomography. Two trained investigators analyzed each computed tomography image in duplicate. Adipose tissue and skeletal muscle cross-sectional areas (centimeters squared) were calculated using standard Hounsfield unit ranges (adipose tissue: −190 to −30 and skeletal muscle: −29 to 150). Regions of interest included abdominal total area, total fat area, subcutaneous fat area, visceral fat area (AVF), and right and left thigh total area, fat area, and skeletal muscle area.
Results: For all images, intra-investigator coefficients of variation ranged from 0.2% to 3.4% and from 0.4% to 5.6% and inter-investigator coefficients of variation ranged from 0.9% to 4.8% and 0.2% to 2.6% for Slice-O-Matic and NIH ImageJ, respectively, with intra- and inter-investigator coefficients of reliability of R2 = 0.99. Mean AVF values for investigators A and B ranged from 168 to 170 cm2 using Slice-O-Matic and NIH ImageJ. Bland-Altman analyses revealed that Slice-O-Matic and NIH ImageJ results were comparable. The mean differences (95% confidence intervals) between the AVF cross-sectional areas obtained using the Slice-O-Matic and NIH ImageJ medical imaging software were +2.5 cm2 (−5.7, +10.8 cm2) or +1.4% (−3.4%, +6.4%).
Discussion: These findings show that both the Slice-O-Matic and NIH ImageJ medical imaging software systems provide reliable measurements of adipose tissue and skeletal muscle cross-sectional areas.