Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made with the next preceding similar examination obtained two hours earlier during the same day . The extensive bilateral multifocal patchy and confluenting parenchymal densities are similar to what has been described on the preceding examination . Comparison with findings on examination of ___ demonstrates progression of the patchy infiltrates . There is also blunting of the lateral pleural sinuses indicating at least moderate amount of pleural effusion . No pneumothorax is found . When comparison is extended to the next previous available chest examination of ___ , there existed only small regional basal parenchymal densities mostly on the left side .
    OUTPUT:
    
Advanced bilateral pulmonary opacities most likely related to aggressive infectious process . Pulmonary vascularity can not be assessed as they are overshadowed by the infiltrates . As previously commented , significant cardiac enlargement can not be identified on these portable chest examinations .