When one<unk>  is opacified completely, establishing volume loss is important. Therefore observe the position of the trachea, crowding of the ribs, shift of the mediastinum and position of diaphragm.
White out of the hemithorax
Eventration of the diaphragm
Pleural friction rub
Pulmonary consolidation
Trapped lung
Subcutaneous emphysema
Confusion chest x ray
Tracheal deviation