Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal chest radiograph demonstrates a normal cardiomediastinal silhouette and fairly well - aerated lungs without focal consolidation , pleural effusion , or pneumothorax . Patchy opacities in the lung bases may reflect atelectasis . No acute osseous abnormality is detected .
    OUTPUT:
    
Patchy opacities in the lung bases may reflect atelectasis but infection is not excluded in the correct clinical setting .