Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild diffuse increase in interstitial markings bilaterally consistent with mild interstitial pulmonary edema . There is slight blunting of the bilateral costophrenic angles which may be due to very trace pleural effusions . The cardiac silhouette is top - normal to mildly enlarged . The aorta is slightly tortuous . There is no pneumothorax .
    OUTPUT:
    
Interstitial edema and possible very trace bilateral pleural effusions .