Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the chest radiograph obtained 1 day prior , there are increased opacities in the right lower lung with air bronchograms concerning for a pneumonia . Small , right pleural effusion appears minimally increased and small , left pleural effusion appears essentially unchanged . Left retrocardiac atelectasis is unchanged . Moderate cardiomegaly and mild pulmonary vascular enlargement appears unchanged . Incidental note is made of extensive left glenohumeral osteoarthritis with bursal calcification .
    OUTPUT:
    
Increased right lower lung opacities concerning for pneumonia or alternatively atelectasis .