Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and pulmonary vasculature are unremarkable . No definite focal consolidation is identified . Basilar opacities may represent atelectasis . There is no pleural effusion or pneumothorax . There is no subdiaphragmatic free air .
    OUTPUT:
    
No acute intrathoracic abnormality .