Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . There is no consolidation , pulmonary edema , pleural effusion , or pneumothorax . The heart size is at the upper limits of normal , and unchanged from the prior exam . The mediastinal contours are stable . There is no evidence of free air below the hemidiaphragms .
    OUTPUT:
    
No acute cardiopulmonary process .