Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Right lung volume loss in the prior study has improved , although the volume of the right lung remains less than that of the left . Increased interstitial markings bilaterally suggests mild to moderate pulmonary edema , asymmetric , worse on the right , a in size or atypical infection given patient 's history of HIV . More opacification at the medial right lung base has been present over multiple prior studies and may represent combination of epicardial fat pad an infection / fluid overload . A small right pleural effusion is seen . There is no pneumothorax . The cardiac silhouette remains mild to moderately enlarged . Mediastinal contours are stable .
    OUTPUT:
    
Increased interstitial markings bilaterally , more so on the right , which could represent asymmetric pulmonary edema or atypical infection , given patient 's history of HIV . More focal opacity at the right lung base could relate to right epicardial fat pad and fluid overload versus infection . Small right pleural effusion .