Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . Mild atherosclerotic calcifications are seen within the aortic arch . Mediastinal and hilar contours are within normal limits . Mild prominence of the pulmonary vascular markings suggest mild pulmonary vascular congestion . Additionally , scattered patchy opacities are seen within the left upper lobe , and both lung bases , findings which are concerning for infection in the correct clinical setting . No pleural effusion or pneumothorax is identified . There are moderate multilevel degenerative changes noted in the thoracic spine .
    OUTPUT:
    
Patchy opacities in left upper lobe and both lung bases , findings concerning for infection in the correct clinical setting . Probable mild pulmonary vascular congestion .