Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The lateral radiograph is degraded by motion artifact . There is vascular crowding but no frank pulmonary edema . Appearance of the cardiomediastinal silhouette is unchanged . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Limited study but no definite acute cardiopulmonary abnormality