Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates near complete opacification of the left hemi thorax consistent with known large left pleural effusion and compressive atelectasis . There is a small aerated portion of the lung in the upper left hemi thorax . There is a new moderate right - sided pleural effusion . Linear annular abnormality over the right central lung field likely represents artifact external to the patient . There is no pneumothorax . Note is made of a chronic right anterior shoulder dislocation , which is stable over multiple recent radiographs .
    OUTPUT:
    
Near complete opacification of the left hemi thorax consistent with large left pleural effusion and compressive atelectasis . New moderate right - sided pleural effusion . No pneumothorax .