Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior film , dense diffuse bilateral opacities are again seen with possible slight worsening in the right lung . The appearance of the left lung is similar prior film . Cardiomediastinal silhouette is completely obscured . Costophrenic angles remain visible , making large pleural effusions unlikely . The left - sided PICC line is similar in configuration .
    OUTPUT:
    
Dense diffuse alveolar infiltrates in both lungs , with probable slight interval worsening on the right and with resultant obscuration of the cardiomediastinal silhouette . As before , the differential includes inflammatory or infectious changes as well as ARDS . While pulmonary edema could have a similar appearance , this may be less likely given continued visualization of the costophrenic angles .