Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is mildly to moderately enlarged . The mediastinal and hilar contours are within normal limits . Pulmonary vasculature is not engorged . Streaky opacity within the left lung base likely reflects atelectasis , and no focal consolidation is present . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities . Surgical anchors are demonstrated overlying the left humeral head .
    OUTPUT:
    
Patchy left basilar opacity , likely atelectasis . Infection however is not completely excluded in the correct clinical setting .