Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was provided . Small right pleural effusion with associated compressive lower lobe atelectasis is better assessed on same date chest CT . The cardiac silhouette appears prominent though this is attributable to prominent epicardial fat . The left lung is clear . Mediastinal contour is notable for a calcified and unfolded thoracic aorta . No pneumothorax . Degenerative AC joint arthropathy noted bilaterally . No free air below the right hemidiaphragm .
    OUTPUT:
    
Small right pleural effusion with right basilar atelectasis . No edema or interval change from CT chest performed earlier today .