Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: One portable AP upright view of the chest . In the left mid and lower lung , there is an opacity concerning for pneumonia . The right lung appears clear . There is no pleural effusion on the right . There is no evidence of pneumothorax in either lung . The left hemidiaphragm is not well seen and a small left pleural effusion can not be ruled out .
    OUTPUT:
    
Left mid and lower lung opacities concerning for pneumonia . Probable small left pleural effusion .