Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffuse alveolar opacities are new and greater on the left compared to the right . Though findings are typical for pulmonary edema , given the distribution and chronic appearance as compared to multiple prior CTs , consideration should be given to other causes , possibly a fulminant allergic or toxic alveolitis . No large pleural effusions are evident . Mediastinal contours are within normal limits . The cardiac silhouette is normal in size . No pneumothorax is evident .
    OUTPUT:
    
Recurrent diffuse alveolar opacities . Possibly due to pulmonary edema though other etiologies should also be considered given the distribution and chronicity .