Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , exaggerating pulmonary vascular markings . Otherwise , the cardiomediastinal silhouette is within normal limits . Mild bibasilar atelectasis is accompanied by small pleural effusions . There is no pneumothorax . No acute fractures are identified . Air and contrast material is visualized throughout the colon . The ascending aorta is tortuous or dilated but probably unchanged since ___ .
    OUTPUT:
    
1 . Low lung volumes with bibasilar atelectasis and small effusions . 2 . The ascending aorta is tortuous or dilated but probably unchanged since ___ .