Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Fusion device partially imaged in the lower C - spine . The lungs appear clear bilaterally without focal consolidation , effusion , or pneumothorax . The heart and mediastinal contours are stable . Bony structures are intact . There is widening of the left AC joint which appears stable from prior exam dating back to ___ .
    OUTPUT:
    
No acute findings in the chest .