Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . As before , there is status post sternotomy . Heart size has not changed . A previously existing left - sided PICC line has been removed . No pneumothorax is present in the apical area . Left - sided blunting of lateral pleural sinus and moderate elevation of diaphragmatic contours exists as before . Pleural scar formations in this area have increased in thickness , but there is no evidence of free fluid remaining , or any cavitation noted . No new pulmonary abnormalities . The right - sided pleural densities remain rather unchanged and the same holds for thickening of the interlobar fissure in its dorsal superior extension , simulating the appearance of an atelectasis . No new pulmonary parenchymal abnormalities are seen and the thickening of the pleural space in the right - sided apical area is stable . No evidence of pneumothorax .
    OUTPUT:
    
No major interval changes . Observe that the next preceding examination was already a study four days following the empyema surgery . All drainage tubes have been removed from the left hemithorax already at that time .