Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild diffuse increased interstitial lung markings of unknown etiology . This could be related to pulmonary edema with small bilateral pleural effusions . Because the heart contour and azygous vein are not dilated , it would be a non cardiogenic edema . There is no pneumothorax .
    OUTPUT:
    
Mild increased in interstitial lung markings of unknown origin . It could possibly be due to noncardiogenic pulmonary edema .