Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single portable chest examination with patient in semi-upright position . Comparison is made with the frontal view of the next preceding PA and lateral chest examination . The right - sided rather massive pleural effusion may have increased slightly even when paying attention to possible changes in patient 's position . Right lower lung area obscured by the pleural effusion . There are some scattered infiltrates in the left lung base , probably plate atelectasis . There is no evidence of left - sided pleural effusion as the lateral pleural sinus remains free .
    OUTPUT:
    
Possibly increased right - sided pleural effusion identified on single AP portable chest view . This examination can not be expected to answer questions posed as there are no previous chest examinations available for comparison , the proper diagnosis will require a chest CT .