Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Opacity projecting over the left midlung laterally is unchanged from multiple prior exams including chest CT from ___ and is likely related to postradiation changes . The lungs are otherwise clear . The cardiac , hilar and mediastinal contours are normal . Inferior vena cava filter projects over the right upper abdomen . In addition , catheter projects in the left upper quadrant .
    OUTPUT:
    
No acute cardiopulmonary process .