Cosmetic Reconstruction of Frontotemporal Depression Using Polyethylene Implant after Pterional Craniotomy

Figure 5

Calculation of temporalis muscle volume using ImageJ. (Top) A square with the length of the reduced scale (1cm) in an axial section of a computed tomography (CT) image was drawn. The number of pixels inside the square per unit area (1 cm²) was calculated to be 3025 using the rectangular selection tool. (Bottom) A curved line was drawn along the margin of the temporalis muscle using the freehand selection tool. The number of pixels inside the region of interest was determined.