Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is large area of opacity projecting over the right mid and lower hemi thorax worrisome for pneumonia with possible underlying pleural effusion . The left lung is clear . No left pleural effusion is seen . There is no pneumothorax . The right heart border is not well assessed to the right - sided opacity , however , the cardiac silhouette appears top - normal to mildly enlarged . Relative lucency projecting over portion of the right lung opacity felt to most likely represent aerated lung , less likely cavity .
    OUTPUT:
    
Large opacity projecting over the right mid to lower lung worrisome for pneumonia with possible underlying pleural effusion . Relative lucency projecting over portion of the right lung opacity felt to most likely represent aerated lung , less likely cavity .