Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate regional peribronchial infiltration and consolidation in the posterior segment of the left upper lung . There is no pleural effusion , or pneumothorax . The cardiac silhouette is normal in size , the mediastinal contours are normal .
    OUTPUT:
    
Left upper lobe pneumonia . Recommend repeat views in 6 weeks to confirm resolution after treatement , or sooner if patient does not improve . Recommendations were reported to the ED QA nurses by email .