Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 08 :29 is submitted .
    OUTPUT:
    
Lung volumes remain low and there are streaky residual opacities at both bases , left more than right , which overall have slightly improved suggesting resolving atelectasis or pneumonia . No pulmonary edema . Overall cardiac and mediastinal contours are stable . No pneumothorax or large effusions . Mild degenerative changes seen involving the right glenohumeral joint . The left humeral head has a somewhat mottled appearance on the current study possibly related to degenerative change and patchy osteopenia due to the positioning , although an acute process can not be excluded . Clinical correlation is recommended .