Fig. 1

The reconstruction of the lungs of an untreated mouse shown with the sole intent of representing the attenuation profile of the chest. Sagittal (left b), coronal (center b), transaxial (right b) planes and minimum intensity projection (a). Certain attenuation ranges were abstracted from these slices in sagittal, coronal and transaxial planes. c −700 – -400 relative HU (lung parenchyma), (d): −100 – +200 relative HU (pleura, endothoracic fascia, epipleural fat and interlobar fissures), (e): +200 – +500 relative HU (respiratory- and heart muscles, diaphragm), (f): +500 – +800 relative HU (blood inside the vessels, aorta and heart, lymphatic fluid and interlobar fissures), and (g): +1400 – +3800 relative HU (bones)