Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is in unchanged position . Mild to moderate cardiomegaly is similar . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is not engorged . Patchy bibasilar opacities likely reflect areas of atelectasis . No pleural effusion or pneumothorax is present . There are mild degenerative changes noted within the shoulders and imaged thoracolumbar spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .