Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , limiting evaluation and accentuating the bronchovascular structures . Within the limitations , there is no focal opacity , pulmonary edema , pleural effusion , or pneumothorax . The mediastinal contours are normal . The heart size is moderately enlarged , and unchanged from the prior exam .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Unchanged moderate cardiomegaly .