Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the upper chest was obtained . Available for comparison is the next preceding portable chest examination of ___ with patient in supine position . On the present examination , the patient is extubated . Multiple lines apparently external , are overlying the upper chest . Status post sternotomy and previous bypass surgery appears unchanged . Pulmonary vasculature is not congested . There is no evidence of pneumothorax on either side in the apical areas nor is there evidence of any widening of the superior mediastinum and the aortic arch contour is unchanged in comparison with the previous study .
    OUTPUT:
    
Considering that the patient has been partially elevated , this study eliminates the possibility of a pneumothorax on either side .