Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is normal . There is mild elevation of the left hemidiaphragm due to mildly distended colonic loops of bowel . There is minimal subsegmental atelectasis in the left lung base . Otherwise the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Elevated left hemidiaphragm with mildly prominent gas - filled loops of colon and adjacent left basilar subsegmental atelectasis . No radiographic evidence for pneumonia .