Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly that is unchanged . The mediastinal silhouette is normal . The lungs are clear without evidence of focal opacities or pulmonary edema . The hila are within normal limits . There is no evidence of pleural effusions which is an interval improvement from prior study .
    OUTPUT:
    
No acute cardiopulmonary etiology consistent with cough .