Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . In comparison with the next previous examination of ___ , the patient has been extubated and the NG tube has been removed . Right internal jugular central venous line has been placed , now seen to terminate overlying the right - sided mediastinal structures at the level of the carina . This corresponds to the mid portion of the SVC . There is no evidence of pneumothorax on either side . In comparison with the next preceding portable chest examination , the at that time existing linear densities on the right base have disappeared , indicating resolution of the local atelectasis . A small linear density exists now on the left base indicating a peripheral atelectasis . The left lateral pleural sinus is now free indicating regression of the previously suspected small amount of pleural effusion .
    OUTPUT:
    
No evidence of pneumothorax following extubation . Improved ventilation of lung bases in comparison with previous study .