Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patchy right upper lobe opacity could be chronic or due to infection . No priors available for comparison . There is subtle patchy opacity left upper lung , to a lesser extent . Streaky left base opacity is seen . No pleural effusion or pneumothorax . The cardiac silhouette is not enlarged . There is subtle right paratracheal opacity which could be due to fat although lymphadenopathy is not excluded .
    OUTPUT:
    
Patchy left base opacity could be due to atelectasis or pneumonia . Additional streaky bilateral upper lobe opacities are of indeterminate age . No priors for comparison .