Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Relatively low lung volumes are again noted with diffuse increased interstitial opacities compatible with patient 's known history of pulmonary fibrosis . There are , however , new more confluent regions of opacity in the right mid - to - upper lung and potentially the left lung base as well . There is no effusion . The cardiomediastinal silhouette is stable . No acute osseous abnormality is identified .
    OUTPUT:
    
Increased opacities in the right mid - to - upper lung and potentially left lung base , superimposed on chronic lung disease compatible with patient 's known pulmonary fibrosis . Findings could represent superimposed asymmetric edema versus infection .