Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Nasogastric tube tip terminates within the stomach . Heart size is normal . Aorta remains mildly tortuous and diffusely calcified . Hilar contours are stable . Chronic interstitial abnormality is demonstrated within the lung bases . Previously noted more focal opacities in the lung bases appear improved , likely reflective of resolved infection or inflammation . Emphysema is again seen . No pneumothorax or pleural effusion is identified . Dilated loops of small bowel are noted within the imaged portion of the upper abdomen . There are no acute osseous abnormalities .
    OUTPUT:
    
Improved aeration within the lung bases with residual interstitial opacities likely reflective of chronic changes . Dilated loops of small bowel within the imaged upper abdomen compatible with small bowel obstruction as noted on the prior CT .