Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable moderate cardiomegaly . The mediastinal contours are unchanged . Bilateral hila are not well seen . Diffuse bilateral nodular appearing airspace opacities likely represent pulmonary edema , however this appearance is nonspecific and differential includes alveolar hemorrhage in addition to disseminated Wegener 's or multifocal infection , possibly septic emboli . Difficult to exclude trace pleural effusions . No pneumothorax .
    OUTPUT:
    
1 . Likely severe pulmonary edema . However given nodular appearance , if patient does not respond to diuresis , consider alternative etiology such as Wegener 's or multifocal infection , as above . 2 . Stable moderate cardiomegaly .