Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exams from ___ and ___ . There is minimal residual retrocardiac opacity identified . Elsewhere , the lungs are clear of consolidation or effusion . Cardiomediastinal silhouette is stable as are the osseous and soft tissue structures . Previously seen left internal jugular central line is no longer visualized .
    OUTPUT:
    
Faint residual retrocardiac opacity which has significantly improved since ___ and could represent some residual atelectasis . Clinical correlation suggested .