Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a dual - lead pacemaker / ICD device in similar position with leads terminating in the right atrium and ventricle , respectively . There is similar mild relative elevation of the right hemidiaphragm . Lung volumes are moderately low . Seen on the lateral view only is patchy streaky opacity projecting over the lower posterior lungs , probably within the left lower lobe , most suggestive of minor atelectasis or scarring . Otherwise , the lungs appear clear . There is no pleural effusion or pneumothorax . Small - to - moderate osteophytes are similar throughout the thoracic spine .
    OUTPUT:
    
Patchy left basilar opacity , probably compatible with atelectasis or scarring , perhaps in association with spinal osteophytes . Although less likely , an infectious etiology is difficult to completely exclude , however .