Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower . Mild elevation of the right hemidiaphragm persists . Atelectasis explains greater opacification lower lungs . The heart is top - normal in size and there is greater distention of pulmonary and mediastinal vasculature , but no pulmonary edema . . There is no pneumothorax or appreciable pleural effusion .
    OUTPUT:
    
1 . Left lower lung atelectasis , less likely . 2 . Increased intravascular volume , no pulmonary edema .