Two comparisons were made using ANCOVA analyses with log time as a covariate, excluding the 26-week time point. The effects of radiation on bone (RTx-VEH vs. Ctrl-VEH) are described in the left column for a mean cortical thickness, c metaphyseal trabecular BV/TV, e distal femur bone volume, and g apparent strength. The effects of PTH delivery on irradiated limbs (RTx-PTH vs. RTx-VEH) are described in the right column for b mean cortical thickness, d metaphyseal trabecular BV/TV, f distal femur bone volume, and h apparent strength. Data are presented as average ± standard deviation vs. Log time