Fig. 4.

The case of a 65-year-old patient complaining of fever, cough, and fatigue for 4 days, without signs of respiratory failure and showing normal saturation in room air. The CT scan shows bilateral early smooth GGO affecting main part of the lung periphery. The correspondent LUS exam shows the typical interstitial signs with patchy distribution well characterized by the “light beam” in abrupt alternance with “spared areas”. CT computed tomography, LUS lung ultrasound, GGO ground-glass opacity