Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate platelike atelectasis in the left mid lung . The lungs are otherwise clear , without focal consolidation . The heart is stably mildly enlarged . The mediastinal and hilar contours are unchanged . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of pneumonia or pleural effusion .