Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 15 : 15 is submitted .
    OUTPUT:
    
Tracheostomy tube remains unchanged position . A right subclavian PICC line continues to have its tip in the proximal SVC . Diffuse bilateral airspace process persists but may be slightly improved suggesting a component of resolving edema . There are layering bilateral effusions . No pneumothorax . Cardiac and mediastinal contours are stably enlarged dating back to ___ .