Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show a left chest wall pacemaker with appropriately positioned right atrial and right ventricular leads . The lung volumes are slightly decreased , and there is mild right basilar atelectasis . Otherwise , the cardiac and mediastinal contours are normal and no focal consolidation is seen . No pleural abnormality is detected .
    OUTPUT:
    
No acute pneumonia . Mild right basilar atelectasis .