116 (Hydrogel) 117 (Hydrogel) 120 (Hydrogel +MSCs) 121 (Hydrogel +MSCs) 122 (Hydrogel +MSCs) UNPROCESSED IMAGES represented as 2D maximum intensity projections MicroComputed Tomography (μCT) Image Processing Program and funciton design by Andrew Graveley. Images provided by Michael D. Hoffmana , Chao Xieb, Xinping Zhangb, and Danielle S.W. Benoit, of the University of Rocehster. PROCESSED IMAGES μCT images convolved by 3D Gaussian kernel and selectively applied with graduated masking in MATLAB TM 116 (Hydrogel) 117 (Hydrogel) 120 (Hydrogel +MSCs) 121 (Hydrogel +MSCs) 122 (Hydrogel +MSCs)