This is right upper lobe collapse. Note the volume loss on the right (the right lung looks smaller and the mediastinum is shifted to the right). Here the horizontal fissure is not seen in its usual place (level of the lateral border of the 6th rib) as it is pulled upwards. The right hilum is elevated. This is a classic appearance of RUL collapse, though there is some consolidation. Refer to the article Patterns of lobar collapse for more information.