Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates a left pectoral dual - channel pacemaker with leads terminating in the right atrium and right ventricle . New since preceding exam is a large right - sided pleural effusion with dense consolidation in the right lower lobe and likely also right middle lobe . This could represent a component of atelectasis , but concurrent infection can not be excluded . There are several more linear areas of subsegmental atelectasis in the right upper lung . The left lung is relatively well aerated . There is no large left pleural effusion . The heart is likely enlarged but suboptimally assessed . The thoracic aorta is mildly unfolded , with arch calcifications . Multilevel lumbar spondylosis is present .
    OUTPUT:
    
New right middle and lower lobe consolidation and enlarging right pleural effusion . While some of this could represent compressive atelectasis , concurrent pneumonia can not be excluded .