To evaluate potential correlations between PET/CT with histopathology, the SUVMax of lesions in the right and left lung of each ferret were compared with the cumulative histopathology scores assigned by the veterinary pathologist (Fig. 6 ). On average, the SUVMax was higher in the right lung than the left lung but the slopes and Spearman's correlation coefficients (r) were similar between the two sides. The highest correlation was seen between the cumulative bronchiolitis score and SUVMax (r of 0.71 and 0.75 on the right and left, respectively). The next highest was between the cumulative bronchitis score and SUVMax (r of 0.69 on the right and 0.67 on the left). A weaker positive correlation was seen between the cumulative alveolitis score and SUVMax (r of 0.47 on the right and 0.57 on the left).