Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A 1 .6 cm oblong radiopaque structure projecting over the upper lateral right hemi thorax may be external to the patient or possibly a stent . Patchy left base retrocardiac opacity seen on the frontal view , not substantiated on the lateral view , may be due to atelectasis . No definite focal consolidation concerning for pneumonia is seen . No pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal to mildly enlarged . Mediastinal contours are unremarkable ca n't not widened as compared to prior studies . The mediastinum is stable since ___ . There is mild pulmonary vascular congestion without overt pulmonary edema .
    OUTPUT:
    
Mild pulmonary vascular congestion without overt pulmonary edema . Mediastinum stable since ___ .