Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Bilateral nipple shadows are again noted . The cardiac and mediastinal silhouettes are stable and unremarkable . Calcification at the aortic knob is again seen . Surgical metallic hardware is partially imaged along the lower cervical spine . There are degenerative changes along the thoracic spine , most noted in the mid portion , stable since the prior study .
    OUTPUT:
    
No acute cardiopulmonary process . No significant interval change .