Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Patchy opacity in the left lower lobe likely reflects an area of atelectasis . Remainder of the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities seen . Clips are seen within the left neck .
    OUTPUT:
    
Patchy left basilar opacity , likely atelectasis .