Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are markedly diminished with resultant subsegmental atelectasis at the bases . No consolidation or edema is noted . The mediastinum is unremarkable . The cardiac silhouette is within normal limits for size . No effusion or pneumothorax is noted . Residual contrast is noted within upper abdominal bowel loops .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . Otherwise , no acute pulmonary process .