"pulmonary oedema/ARDS"
Expected headings
"Volume loss"
"No change in volume"
"Increased volume"
"Complete white-out of a hemithorax on the chest x-ray has a limited number of causes. The differential diagnosis can be shortened further with one simple observation: the position of the trachea, heart and mediastinum. Are they central, or are they displaced towards or away from the opacified lung? Changes in volume of the opacified hemithorax will also affect rib spacing."