Fig. 3From: The impact of imaging time and contrast agent dose on screening for osteoporosis with contrast-enhanced CTVolume bone mineral density (vBMD) over time in computed tomography (CT) perfusion imaging (CTPI) examination (black line) and 4-phase CT examination (triangles). In CTPI, statistically higher vBMD values were found for all time-points after 17.5 s (* in label of x-axis) compared to reference value at 7 s (unenhanced phase in vertebrae). Similar significant differences were observed for 4-phase CT where the arterial, venous, and late venous phase had significantly higher vBMD estimations than the unenhanced phase (+). */+ indicates p < 0.05, **/++ indicates p < 0.01, and ***/+++ indicates p < 0.001Back to article page