Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Linear opacities at the right base are similar to the prior radiograph , and likely represents atelectasis . There is no focal airspace opacity . There is no pulmonary edema , pleural effusion , or pneumothorax . The mediastinal contours are normal . The heart size is mildly enlarged , and unchanged .
    OUTPUT:
    
No acute cardiopulmonary process ; specifically no evidence of pneumonia .