Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is dense opacification of the left lung base with patchy areas of opacification within the right lung . Know interstitial opacities demonstrated opn the previous chest CT are less visible now . Left - sided opacity obscures the cardiac border . There is no pneumothorax . There is likely a left - sided pleural effusion .
    OUTPUT:
    
Dense opacity at the left lung base with patchy areas of opacity at the right lung , findings concerning for multifocal infectious process with pulmonary edema being less likely . Underlying interstitial lung disease .