Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation , pleural effusion or pneumothorax . The heart is normal in size . Normal cardiomediastinal silhouette . The heart was moderately enlarged on the prior study but has since normalized , suggesting in the setting of the acute illness on the prior study there was cardiac enlargement perhaps due to a pericardial effusion .
    OUTPUT:
    
No acute intrathoracic process .