Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has had median sternotomy and CABG with a normal postoperative cardiomediastinal silhouette and unchanged moderate cardiomegaly . Bilateral moderate lower lung atelectasis is unchanged . A small left apical pneumothorax is unchanged but the left basilar pneumothorax has improved . No focal consolidations pleural effusions , or pulmonary edema are seen . A right IJ CVC terminates in the right atrium .
    OUTPUT:
    
1 . Small left apical pneumothorax and small left basilar pneumothorax both improved slightly . 2 . Stable bilateral mild lower lung atelectasis .