Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest was obtained with patient in semi-upright position . Comparison is made with the next preceding similar study of ___ . The on previous examination described hazy parenchymal densities in the lateral aspect of the right upper lobe persist and may even have increased slightly . There are no other new abnormalities present . The previously described multiple old right - sided rib fractures and pleural scar formations on the left base remain unchanged . Observed multiple semi-linear lines traversing the upper thorax bilaterally . They should not be confused with a pneumothorax but most likely represent skin folds in this patient examined in semi-erect recumbent position .
    OUTPUT:
    
Right upper lobe hazy ground - glass densities persist . Differential diagnosis between pneumonitis and aspiration pneumonia can not be decided on this portable single view examination , but must be supported by clinical findings .