Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Evaluation somewhat limited due to underpenetration . An abandoned fragment of an AICD remains in place projecting over the mediastinum . Lungs are clear . Cardiomediastinal silhouette is stable . Bony structures are intact . Superior endplate compression deformity in the upper lumbar spine is again seen .
    OUTPUT:
    
Retained AICD fragment again noted . No acute intrathoracic process .