Figure 2
From: Clinical review: Lung imaging in acute respiratory distress syndrome patients - an update
Representative images of cross-registered computed tomography (CT) and [18F]-fluoro-2-deoxy-D-glucose (18-FDG) positron emission tomography from two patients with acute lung injury/acute respiratory distress syndrome. The CT image was acquired during a respiratory pause at mean airway pressure. The gray scale is centered at −500 Hounsfield units with a width of 1,250 Hounsfield units. Positron emission tomographic images represent the average pulmonary 18-FDG concentration during the last 20 minutes of acquisition (from 37 to 57 minutes since 18-FDG administration); the color scale represents radioactivity concentration (kBq/ml). (A) 18-FDG distribution parallels that of the opacities detected on CT. (B) Intense 18-FDG uptake can be observed in normally aerated regions (square 1), while activity is lower in the dorsal, ‘non-aerated’ regions of both lungs (square 2). Reproduced from [44] with permission from Wolters Kluwer Health.