Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . Minimal opacity in the left lung base likely reflects atelectasis . No focal consolidation is present . Hilar and mediastinal silhouettes are unremarkable . Heart size is top normal . There is no pulmonary edema , pleural effusion , or pneumothorax . Visualized osseous structures appear intact .
    OUTPUT:
    
Minimal left basilar atelectasis . No radiographic evidence of pneumonia .