Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is not engorged . Lung volumes are slightly low . Patchy atelectasis is demonstrated in the right lung base . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormalities seen . Mildly distended loops of colon are noted in the left upper abdomen .
    OUTPUT:
    
Slightly low lung volumes with mild right basilar atelectasis .