Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Bilateral brain stimulator , generators and leads are seen , slightly rotated in positioning when compared to prior . Where seen , the lungs remain clear . The previously seen retrocardiac opacity is again seen only on the frontal view and on the lateral is likely obscured by degenerative changes in the spine . There is no effusion or pulmonary vascular congestion . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process . Persistent retrocardiac nodule for which dedicated non-urgent chest CT is again suggested .