Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A dual - lead pacemaker / ICD device is in place with leads terminating in the right ventricle and coronary sinus . The heart appears mildly enlarged . The aortic arch is calcified . There is no pleural effusion or pneumothorax . Patchy medial basilar opacities suggests minor atelectasis . Otherwise , the lungs appear clear . Mild degenerative changes affect the lower thoracic spine .
    OUTPUT:
    
Patchy medial basilar opacity suggesting minor atelectasis .