“…-Cardiogenic origin (Figure 4) can be characterized by: typical B-lines or vertical artifacts (laser-like, bright) with the septal disposition (early stage); modulated B-lines (early stage); regular pleural line; the presence of pleural sliding; diffuse pulmonary involvement without spared areas (bilaterally); absence of consolidations, pleural nodules or pleural irregularities. Furthermore, they are all characteristics that can take on a dynamic aspect depending on the patient's position, the effects of the exercise and therapy (Coca Pérez et al, 2016;Martelius et al, 2016;Sferrazza Papa et al, 2017;Yousef, 2017;Joshi et al, 2019;Soldati et al, 2019;Buonsenso et al, 2020). -Pneumogenic origin (Figure 9) can be characterized by: unusual septal disposition of B-lines; blurred, uneven, coalescent B-lines and white lung; non-modulated B-lines or pseudo-B-lines; irregular pleural line; reduced pleural sliding; monofocal or multifocal, patchy or inhomogeneous involvement; consolidations, subpleural nodules or micronodules (generating pseudo-B-lines).…”