Figure 3: (a-top row) Selected CT axial cross sections through the mid thigh (a-middle row) muscle boundaries derived from segmentation, showing exclusion regions for the femur and the femoral arteries (a-bottom row) muscle boundaries transposed from CT image to axial cross sections of corresponding PET image. (b) Anteroposterior scoutview showing definition of superior and inferior extents of analytic region of interest to define TAC. (c) Cross-section through PET image showing muscle region used for TAC generation and (d) plot of left (upper curve) and right leg (lower curve) TACs.