Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph ___ at 09 : 50 is submitted .
    OUTPUT:
    
Overall , there is improvement in the pulmonary edema . There is still prominence of the perihilar vasculature and mild interstitial edema . The heart remains stably enlarged along with the mediastinal contours . A tracheostomy tube is remains in satisfactory position . Lung volumes remain low . The patient 's mandible obscures the lung apices but no obvious pneumothorax is appreciated . No large effusions . No developing airspace consolidation to suggest pneumonia .