Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . There is no definite sign of pneumonia or CHF . Overall appearance of the chest is unchanged from prior exam . No effusion or pneumothorax . Cardiomediastinal silhouette is stable with an unfolded thoracic aorta likely accounting for the retrocardiac density . The bony structures are intact .
    OUTPUT:
    
No acute findings in the chest .