Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable kyphotic upright chest radiograph demonstrates little change in low lung volumes with bibasilar atelectasis , although the pulmonary vasculature appears more indistinct suggesting interval development of pulmonary vascular engorgement and mild pulmonary edema . Pleural effusion is minimal if any . The central airways are heavily calcified . The cardiac silhouette remains enlarged , the mediastinal contours are indistinct . A left subclavian approach central venous catheter tip is positioned at the confluence of the brachiocephalic vein and SVC with the tip projecting laterally .
    OUTPUT:
    
Interval increase in mild pulmonary vascular congestion and pulmonary edema superimposed upon chronic low lung volumes with bibasilar atelectasis .