Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Bibasilar ill - defined opacities are reidentified not significantly changed from prior examon ___ . Of note , new rounded opacities are noted in the left perihilar location measuring approximately 1 .4 and 1 .3 cm respectively . There may also be another rounded opacity measuring 1 .2 cm in the right upper lobe . Cardiomediastinal and hilar contours are grossly unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . New rounded opacities in the left perihilar region and in the right upper lobe in this patient with history of substance abuse raise concern for pulmonary infectious emboli . the differential includes other causes of pulmonary nodules . Further assessment with CT is recommended . 2 . Unchanged bibasilar opacities from ___ raise concern for chronic infectious pneumonia , likely from an atypical organism in this immunocompromised patient . Chrnoci aspiration or an inflammatory process might also account for this appearance .