- BV/TV values of two donors (no.3 and no.8) were obtained by histomorphometry and XtremeCT imaging. BV/TV results of proximal tibia and lumbar spine were related to correspondent iliac crest results and listed as ratios. Exemplary bone biopsy images from histology (a, scale bar = 1 mm) and XtremeCT (b, scale bar = 1 mm) are shown, in addition