Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes , which crowd the bronchovascular markings . There is mild pulmonary edema . A left lower lobe opacity may represent pneumonia . No pleural effusion or pneumothorax . The cardiomediastinal and hilar contours are normal .
    OUTPUT:
    
Mild pulmonary edema . Left lower lobe opacity may represent pneumonia , repeat radiographs can be done after resolution of edema for further evaluation .