Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There remains marked elevation of the left hemidiaphragm . New increased opacity in the left retrocardiac region adjacent to an increasingly elevated left hemidiaphragm could reflect atelectasis or aspiration given the clinical suspicion for the latter entity . A subcentimeter nodular opacity in the level of the right third anterior rib is again demonstrated and previously carried a recommendation for followup chest radiographs . Linear opacities at right lung base are consistent with atelectasis . Cardiomediastinal contours are unchanged .
    OUTPUT:
    
Left lower lobe atelectasis or aspiration . Persistent nodular opacity right ___ anterior rib level . PA and lateral CXR are recommended for more complete evaluation of these findings when the patient 's condition permits .