Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . The cardiomediastinal silhouette , including mild cardiomegaly , is unchanged from the prior study . Lungs are slightly hyperexpanded but grossly clear .
    OUTPUT:
    
No evidence for acute cardiopulmonary process .