Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bilateral deep brain stimulator generators and leads extending into the neck and out of the field of view . The lung volumes are low . There is a small round opacity in the retrocardiac region , concerning for a small pulmonary nodule . There is no consolidation , pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Mitral annulus calcifications are noted .
    OUTPUT:
    
1 . Possible small retrocardiac pulmonary nodule ; recommend further evaluation with a CT of the chest . 2 . No evidence of pneumonia . Results were discussed with ___ ( neurosurgery NP ) at 7 :50 AM on ___ via telephone by Dr . ___ .