Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval increase in lung volume bilaterally with improvement in aeration . There is improved persistent left lower lobe atelectasis with a small amount of adjacent pleural effusion . There are no areas of focal consolidation . There is no pulmonary edema or pneumothorax . Moderate - to - severe cardiomegaly is comparable to preoperative appearance . Median sternotomy wires are seen in alignment with no evidence of failure . There is a retroxiphoid gas collection which may be infiltrating the mediastinal fat , however , this is not typical in appearance and should be evaluated clinically to detect infection . Pleural surfaces are unremarkable .
    OUTPUT:
    
1 ) No pulmonary edema or pneumothorax . 2 ) Left lower lobe atelectasis has improved , but persists with a small amount of adjacent pleural effusion . 3 ) Cardiomegaly is comparable to preoperative appearance . 4 ) There is an admix of soft tissue and gas which may represent air infiltrating the mediastinal fat , however , infection can not be ruled out . Clinical correlation is recommended . These findings were discussed with nurse ___ ___ via phone by ___ at 1 :35 p .m .