Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Comparison is made with the next preceding similar study of ___ . The overall heart size has not undergone any significant interval change . There are , however , some pleural changes such as the less marked stability of minor and major interlobar fissure , as well as the mild blunting of the lateral pleural sinuses have regressed . This may indicate some hemodynamic improvement with less wetness in the pleural spaces following correction of heart rhythm . No evidence of new pulmonary parenchymal infiltrates and no pneumothorax is seen .
    OUTPUT:
    
Possibly mild changes in appearance of pleural spaces following successful cardioversion .