Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes have decreased in the interim , and there is interval increase in bilateral opacities projecting outward and upward from the hila . There is an increased small left pleural effusion . The cardiac silhouette is normal in size , and the mediastinal contours are normal .
    OUTPUT:
    
Moderate bilateral perihilar pulmonary edema which given the normal heart size is likely noncardiogenic , possibly from volume overload in this patient with renal failure . The upper lobe predominance may reflect reverse Trendelenberg positioning or the patient 's intrinsic pulmonary physiology .