Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The heart is of normal size with stable cardiomediastinal contours . Lung volumes are low . Linear opacity at the right lung base is similar to prior and compatible with subsegmental atelectasis . No focal consolidation , pleural effusion , or pneumothorax . No radiopaque foreign body .
    OUTPUT:
    
Low lung volumes . No evidence for acute cardiopulmonary process .