Fig. 2
From: Prevalence of lung atelectasis in sedated dogs examined with computed tomography
Axial slice showing how measurements were done in each lobe, in this image represented by the left caudal lung lobe. Lung attenuation was measured by placing a ROI of a minimum of 1 cm in the most dorsal and ventral part of the lung lobe, a mean was measured by drawing out the margins of the lung lobe using a free hand drawing tool