Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is tortuous , as seen previously . Mediastinal and hilar contours are otherwise unchanged . Pulmonary vasculature is normal . Patchy opacities are seen in the right lung base , possibly atelectasis . Subsegmental atelectasis is also noted in the left lung base . No focal consolidation , pleural effusion or pneumothorax is present . There are no acute osseous abnormalities seen . Mild degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No evidence for pulmonary edema . Minimal patchy opacity in the right lung base , likely atelectasis .