Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: THERE ARE CONTINUED DIFFUSE INTERSTITIAL ALVEOLAR OPACITIES IN BOTH LUNGS . THE OVERALL APPEARANCE IS SIMILAR , POSSIBLY SLIGHTLY WORSE , COMPARED WITH ___ AT 03 :38 . THE RIGHT COSTOPHRENIC ANGLE IS OBSCURED , SUGGESTIVE OF A SMALL RIGHT PLEURAL EFFUSION . THE LEFT COSTOPHRENIC ANGLE REMAINS CLEAR . FINDINGS HAVE CLEARLY PROGRESSED , WITH PROGRESSION OF ALVEOLAR OPACIFICATION , COMPARED WITH ___ AT 18 :22 .
    OUTPUT:
    
DIFFUSE INTERSTITIAL ALVEOLAR OPACITIES , POSSIBLY SLIGHTLY WORSE COMPARED WITH 1 DAY EARLIER . RIGHT PLEURAL EFFUSION AGAIN SEEN . THE DIFFERENTIAL DIAGNOSIS INCLUDES PULMONARY EDEMA , BUT UNDERLYING INFECTION CANNOT BE EXCLUDED .