Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right subclavian approach central venous catheter is unchanged in position with the tip terminating in the proximal right atrium . The inspiratory lung volumes remain relatively low but there is improved aeration of the right upper lung zone . There is no pleural effusion or pneumothorax . Bilateral opacities in the upper lung zones with perihilar distribution are concerning for multifocal infection given the patient 's clinical history . Subtle opacities at the right lung base , greater than the left , may reflect underaeration or atelectasis . The cardiac silhouette is top normal in size but stable . The thoracic aorta is tortuous . The mediastinal contours are otherwise unchanged .
    OUTPUT:
    
Improved right upper lung aeration but persistent bilateral perihilar opacities worrisome for multifocal infectious process including PCP .