Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral linear and patchy opacities have increased in the right upper lobe , right middle lobe , and left lower lobe since ___ . These findings could represent progression of the previously seen pleuroparenchymal scarring characterized on the CT torso from ___ or could be due to superimposed infection . Normal heart , mediastinal , and pleural surfaces .
    OUTPUT:
    
Increased opacities in the right upper , left lower , and right lower lobes could represent progression of known interstitial lung disease or superimposed infectious process . Correlation with clinical symptoms is recommended . If clinical symptoms of an infection are present , repeat chest radiograph after four weeks of antibiotic treatment is recommended to document resolution of the opacities ; however , if the patient has no symptoms , CT is recommended for further characterization of a possible neoplastic process in the right lower lobe .