Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Total of three radiographs were provided with front filters to determine the presence of a retained foreign body . There is no retained needle within the surgical field . Midline sternotomy wires are present . There is a right IJ access Swan - Ganz catheter with tip in the main PA . Mediastinal drains are present . An AICD is unchanged with tip in the region of the right ventricle . The heart remains mildly enlarged . Endotracheal tube is positioned with its tip above the carina .
    OUTPUT:
    
No evidence of retained needle within the imaged chest .