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. Author manuscript; available in PMC: 2017 Feb 1.
Published in final edited form as: Magn Reson Imaging. 2015 Oct 31;34(2):204–208. doi: 10.1016/j.mri.2015.10.029

Figure 2.

Figure 2

Semiautomated muscle segmentation. The “growing region of interest” interface in Osirix uses the 9 voxels immediately surrounding (outer box) and including a seed point (inner box) selected by the investigator. The algorithm determines the means and standard deviations of signal intensities of these 9 voxels then selects all neighboring voxels falling within a standard deviation of the mean (in purple). The principle is that tissue types with similar signal intensities to the seed point will be segmented while other tissue types are excluded, allowing for the analysis of the muscle tissue.