Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are within normal limits , and the heart size is normal . Focal ill - defined opacities are demonstrated predominantly within the perihilar regions of both upper lobes , as was noted on the prior CT , but new when compared to the prior chest radiograph . No pleural effusion or pneumothorax is present , and there is no pulmonary vascular congestion . There are no acute osseous abnormalities .
    OUTPUT:
    
Multifocal opacities in both lungs , predominantly within a perihilar distribution , as demonstrated on the prior chest CT . Findings again are nonspecific , but concerning for a multifocal infectious process .