Fig. 3From: A study of SPECT/CT camera stability for quantitative imagingGraph of the conversion factors for 99mTc complete data set over the entire 18 months of the study. Data set includes all phantoms, 20 cm, ACR, and IQ (solid diamond) and all liter bottles: 1 (circle)-, 2 (triangle)-, and 4 (square)-L. 72.5 % of the data points are within one standard deviation of the meanBack to article page