diff --git a/app/api/study_topics.py b/app/api/study_topics.py
index 7817692..f362b55 100644
--- a/app/api/study_topics.py
+++ b/app/api/study_topics.py
@@ -1538,21 +1538,12 @@ async def get_quiz_session(
         ).scalars().all()
         by_id = {q.id: q for q in rows}
 
-        # 이미지 batch
-        img_rows = (
-            await session.execute(
-                select(StudyQuestionImage)
-                .where(StudyQuestionImage.study_question_id.in_(qids))
-                .order_by(StudyQuestionImage.study_question_id, StudyQuestionImage.position)
-            )
-        ).scalars().all()
-        images_map: dict[int, list[dict]] = {}
-        for im in img_rows:
-            images_map.setdefault(im.study_question_id, []).append({
-                "id": im.id,
-                "served_url": f"/api/study-questions/{im.study_question_id}/images/{im.id}",
-                "position": im.position,
-            })
+        # 이미지 batch — 기존 study_questions._images_for_questions_batch 재사용 (sort_order 기준).
+        from api.study_questions import _images_for_questions_batch
+        images_typed = await _images_for_questions_batch(session, qids)
+        images_map: dict[int, list[dict]] = {
+            qid: [it.model_dump() for it in items] for qid, items in images_typed.items()
+        }
 
         # attempt count batch (per question)
         stat_rows = (