Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Allowing for patient rotation , mild cardiomegaly and the upper mediastinal silhouette appear stable compared to the prior examination . The lung volumes are slightly low , but there is no focal consolidation concerning for pneumonia , pneumothorax , or pleural effusion .
    OUTPUT:
    
Stable mild cardiomegaly . No evidence of pneumonia .