Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . New focal consolidative opacity is present within the left lower lung field concerning for left lower lobe pneumonia . No pleural effusion or pneumothorax is present . No acute osseous abnormality is demonstrated .
    OUTPUT:
    
Left lower lobe pneumonia .