Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are compared to prior chest x-ray from ___ and chest CT from ___ . Again seen is a large round mass in the right middle lobe with fiducial markers . The known lung nodules on CT are not clearly delineated on the current exam . There is no new consolidation nor effusion . Cardiomediastinal silhouette is unremarkable . Pacing device with three leads is again seen with leads in stable positions . Osseous and soft tissue structures are unchanged .
    OUTPUT:
    
No definite acute cardiopulmonary process . Right middle lobe mass again seen .