Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is hazy left basilar opacity which has been seen on multiple previous examinations . Elsewhere the lungs are clear of consolidation . Enlargement of the cardiac silhouette is similar compared to prior and likely exaggerated by portable technique and prominent mediastinal fat . Atherosclerotic calcifications noted throughout the aorta .
    OUTPUT:
    
Persistent left lower lung opacity potentially atelectasis or scarring given findings on multiple priors . Please note that superimposed infection is not entirely excluded . Consider PA and lateral for further assessment if desired .