Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate the lungs are well expanded and clear . There is no pleural effusion , pulmonary edema , or pneumothorax . Subtle left base opacity is likely due to combination of minor atelectasis and overlapping vascular structures . No definite focal consolidation is seen . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Subtle left base opacity is likely due to combination of minor atelectasis and overlapping vascular structures . No definite focal consolidation is seen .