Different patterns compatible with viral pneumonia in patients on STD (left) and ULD (right) acquisitions at the same anatomical position. (A,B) show extensive subpleural ground; (C,D) consolidation (yellow arrow) surrounded by ground glass; (E,F) air bronchogram (yellow arrow head), equally visible on STD and ULD acquisitions; (G,H) depict crazy paving (yellow circle), not clearly identifiable on the ULD acquisition. STD, standard; ULD, ultra-low-dose.