Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Midline sternotomy wires again noted . Prosthetic cardiac valve is noted . There is diffuse ground - glass opacity which is concerning for moderate to severe pulmonary edema . Difficult to exclude a superimposed pneumonia . No large effusion or pneumothorax . Heart and mediastinal contours are stable . Atherosclerotic calcification of the aortic knob is again noted . Severe degenerative disease at the left shoulder is again noted .
    OUTPUT:
    
Moderate severe pulmonary edema .