Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidation or edema . There is no pleural effusion or pneumothorax . The mediastinal contours are normal . The heart is moderately enlarged , and unchanged from prior exam . This is in keeping with the history of sickle cell disease .
    OUTPUT:
    
Unchanged moderate cardiomegaly . No focal consolidation to suggest acute chest syndrome .