Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac and mediastinal silhouettes are unremarkable . No pleural effusion or pneumothorax is seen . On the lateral view , there is equivocal opacity projecting over the posterior lung base , not well substantiated on the frontal view . Findings could be due to atelectasis although an underlying consolidation is not entirely excluded .
    OUTPUT:
    
On the lateral view , there is equivocal opacity projecting over the posterior lung base , not well substantiated on the frontal view . Findings could be due to atelectasis although an underlying consolidation is not entirely excluded .