Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The aortic knob is calcified . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is normal . Lungs are mildly hyperinflated . Patchy and linear left basilar opacities likely reflect areas of atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Fusion hardware within the lumbar spine is partially imaged .
    OUTPUT:
    
Left basilar patchy and linear opacity , likely atelectasis . Infection can not be excluded in the correct clinical setting .