Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lordotic positioning . Cardiomediastinal silhouette is is at the upper limits of normal or slightly enlarged . There is a right basilar opacity which is new from ___ . There is blunting of the right costophrenic angle , likely representing a small pleural effusion . The left lung is grossly clear , allowing for minimal atelectasis and / or scarring at the left lung base and possible minimal blunting of the left costophrenic angle . No acute osseous abnormality is identified .
    OUTPUT:
    
Right basilar opacity concerning for pneumonia with alternative differential including atelectasis in the setting of a right pleural effusion .