Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided IJ central venous catheter sheath is seen , with the tip in the superior portion of the SVC . A right - sided drainage catheter is seen , perhaps a mediastinal drain vs chest tube . A left - sided chest tube or mediastinal drain is also seen . The patient has been extubated in the interval . No pneumothorax . A curvilinear radiopacity projecting over the left side of the heart is of uncertain significance , perhaps outside of the patient , but should be correlated clinically . It is in a slightly different location than on the prior radiograph . Pulmonary vascular markings are slightly more prominent than on the prior examination , perhaps indicating slight pulmonary edema . Retrocardiac opacity likely relates to atelectasis .
    OUTPUT:
    
Probable pulmonary edema . Curvilinear radiopacity over the left side of the heart , of uncertain significance and location radiographically from this single view , but unchanged since the prior study .