Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is patchy left basilar opacity which could be due to atelectasis , but underlying consolidation due to pneumonia is not excluded . The finding is not well seen on the lateral view . There is minimal vascular congestion . No pleural effusion or pneumothorax is seen . The cardiac silhouette is top normal . The aorta is calcified and tortuous .
    OUTPUT:
    
Patchy left basilar opacity best seen on the frontal view , could represent atelectasis versus consolidation due to focus of pneumonia .