Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine AP portable view of the chest was obtained . Dual - lead left - sided pacemaker is again seen with leads seen without significant change in position . There is mild left base atelectasis . The right lung is clear . No large pleural effusion or pneumothorax is seen . The aorta is calcified and tortuous . The cardiac silhouette is stable . There is diffuse osteopenia .
    OUTPUT:
    
Mild left base atelectasis . Otherwise , no acute cardiopulmonary process seen .