Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate no focal opacity concerning for pneumonia . Cardiomediastinal and hilar contours are unremarkable . Subtle blunting of bilateral costophrenic angles . Trace pleural effusions are difficult to exclude . There is no pneumothorax . No acute osseous abnormalities identified .
    OUTPUT:
    
No acute intrathoracic abnormality .