Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aortic knob is calcified . Mediastinal and hilar contours are unremarkable . The pulmonary vascularity is normal . Minimal patchy left basilar opacity likely reflects atelectasis . There is no focal consolidation . No pleural effusion or pneumothorax is seen . Cervical spinal fusion hardware is partially imaged .
    OUTPUT:
    
Minimal left basilar atelectasis .