Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is top normal . The aorta remains unfolded . Mediastinal contour remains unchanged . New focal consolidative opacity is seen in the left lower lobe concerning for pneumonia . Linear opacities in the right mid lung and lung base are unchanged , likely reflective of areas of scarring . Emphysematous changes are again noted with bilateral pleural parenchymal scarring in the lung apices . There is no pulmonary vascular congestion , pleural effusion or pneumothorax . No acute osseous abnormality is detected .
    OUTPUT:
    
Left lower lobe pneumonia . RECOMMENDATION ( S ) : Followup radiographs after treatment are recommended to ensure resolution of this finding .