Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The study is somewhat limited due to patient rotation . Patchy ill - defined opacities in the lung bases appear slightly progressed when compared to the prior study . This could reflect atelectasis as a result of slightly reduced lung volumes compared to the prior study . Additionally , more focal patchy opacity in the right lung base again may reflect asymmetric pulmonary edema or infection . There are continued small bilateral pleural effusions as well as a loculated right apicolateral pleural effusion . Remainder of the exam is unchanged moderate cardiomegaly . No evidence of pneumothorax . The patient is status post median sternotomy , CABG , pacemaker placement , and left axillary lymph node dissection .
    OUTPUT:
    
Slightly decreased lung volumes compared to the prior study with patchy ill - defined bibasilar airspace opacities likely reflecting atelectasis . More focal opacity in the right lung base could reflect asymmetric pulmonary edema or infection . Remainder of the exam is unchanged .