Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Given slightly low lung volumes , the cardiomediastinal silhouette and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . No opacities concerning for infection are present . There is minimal left lower lobe atelectasis .
    OUTPUT:
    
No evidence of pneumonia , given slightly low lung volumes .