Fig. 1.

Initial X-Ray in supine body position. The choice of lateral tilt was based on the initial X-Ray that was taken in supine body position. The targeted lateral position strategy was defined by selecting the less aerated lung to be positioned up and the more aerated lung to be positioned down. Please note the left-to-right lung asymmetry present on this initial X-Ray: unequivocally more opacities within the left lung