Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided demonstrate no focal consolidation , effusion or pneumothorax . Subtle opacity at the left lung base as correlated with prior CT abdomen and pelvis from ___ likely reflects atelectasis due to diaphragmatic eventration . Cardiomediastinal silhouette appears normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No definite signs of pneumonia .