Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased opacity at the right lung base could be due to atelectasis and / or pleural effusion . Increased atelectasis is noted at the left lung base as well but without pleural effusion . Mildly enlarged cardiomediastinal contour is unchanged . Mild pulmonary edema is stable . Known right rib fractures are not well seen on the exam . There is a hyperlucent line projecting over right humeral head of unclear source .
    OUTPUT:
    
1 . Increased bibasilar atelectasis , right more than left . 2 . Hyperlucent line projecting over right humeral head . Dedicated shoulder radiograph is recommended for further evaluation .