Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No evidence of free air is seen beneath the diaphragms . There is possible subtle opacity projecting over the left mid lung which may be due to overlap of structures although an area of atelectasis , scarring , or small consolidation is not excluded . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
No evidence of free air beneath the diaphragms . Possible subtle opacity projecting over the left mid lung which may be due to overlap of structures although an area of atelectasis , scarring , or small consolidation is not excluded .