Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are normal . There is a tortuous and calcified thoracic aorta . The bilateral hila are unremarkable . Patchy opacities at the lung bases likely reflect atelectasis . Additionally , an ill - defined opacity within the left lower lung appears new since ___ , and may reflect superimposition of overlying structures . Otherwise , there is no focal lung consolidation . There is no pulmonary vascular congestion . There is biapical pleuroparenchymal scarring . There is no pneumothorax or effusion .
    OUTPUT:
    
Ill - defined opacity within the left lower lung , new since ___ , possibly reflecting super imposition of overlying structures . Recommend non-urgent upright PA and lateral chest x-ray .