Had chest x-ray they ask if i have surgeries why?

Often routine: Some centers will ask for a brief surgical or medical history. Surgery on the chest or upper abdomen can leave evidence on a standard chest x-ray. Rib deformity or sutures can be seen.

Many reasons: Retractors are often used for chest surgery and change configuration of ribs. Sutures or vascular clips are often radiopaque and visualized. Cardiac surgery usually has sternal wire sutures when chest entered centrally. Replacement heart valves are visible. Anatomy changes when have lung resection.