Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest film ___ at 09 :29 is submitted .
    OUTPUT:
    
Lung volumes have diminished with crowding of the pulmonary vasculature . No pulmonary edema . Patchy opacity at the left base may reflect atelectasis in the setting of low volumes , although an early pneumonia should also be considered . No large effusions . Overall cardiac and mediastinal contours are stable . No pnuemothorax .