Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is a moderate to large right pleural effusion . There are left basilar and retrocardiac opacities . There is mild cardiomegaly . Mediastinal contour is notable for calcifications of the aortic knob . There is no pneumothorax . There are degenerative changes of the bilateral glenohumeral joints .
    OUTPUT:
    
1 . Moderate right pleural effusion with associated atelectasis . 2 . Left basilar and retrocardiac opacity , concerning for pneumonia , with small left pleural effusion .