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Figure 3. High-frequency ultrasound scans of region of interest (ROI) before ((a) day 7 and (d) day 21) and after ((b) day 7 and (e) day 21) gray levels were reduced from 256 to 64, and after ((c) day 7 and (f) day 21) images were filtered. Vertical lines in (c) and (f) are highlighted. Root mean squares of ROI pixels can be calculated as relevant parameter. Sahar Moghimi, MS , et.al