Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Minimal patchy opacity in the left lung base likely reflects atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . There is mild compression deformity of a mid thoracic vertebral body as well as a vertebral body at the thoracolumbar junction , findings which appear unchanged from ___ . Remote fractures of the left second , third , and fourth ribs are noted .
    OUTPUT:
    
Patchy left basilar opacity , likely atelectasis .