[2025-09-30T06:44:14.246612] [QUERYOME] Starting research for query 544: 'Instructions: 
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer. 

Question:
Best diagnostic investigation for acute appendicitis in children is: 

Options:
{'A': 'MRI', 'B': 'CECT', 'C': 'USG', 'D': 'X-ray.'}'
[2025-09-30T06:44:14.317597] [PI] Starting research for query: 'Instructions: 
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer. 

Question:
Best diagnostic investigation for acute appendicitis in children is: 

Options:
{'A': 'MRI', 'B': 'CECT', 'C': 'USG', 'D': 'X-ray.'}'
[2025-09-30T06:44:14.320096] Saving text to bench_final/run1/medmcqa/medmcqa_543/pi_initial_prompt.txt
[2025-09-30T06:44:14.343731] [PI] Calling o3 for initial analysis...
[2025-09-30T06:44:24.171811] [PI] Reasoning iteration 1
[2025-09-30T06:44:24.175128] [PI reasoning] **Evaluating appendicitis diagnosis**

I need to focus on the best diagnostic investigation for acute appendicitis in children. The options include MRI, CECT, USG, and X-ray. For children, ultrasound is usually the first-line imaging choice because it has no radiation risk and high sensitivity and specificity when performed by skilled practitioners. While CECT is common in adults, radiation concerns arise. MRI is another option but is less accessible. Therefore, my conclusion is to recommend ultrasound as the best option, supported by guidelines.
[2025-09-30T06:44:24.176953] [PI] Executing function call 1: hybrid_search
[2025-09-30T06:44:24.179560] [PI] Function arguments: {'query': 'ultrasound first line imaging appendicitis children', 'k': 5, 'faiss_weight': 0.4, 'bm25_weight': 0.6, 'use_rrf': True}
[2025-09-30T06:44:24.181154] Saving JSON to bench_final/run1/medmcqa/medmcqa_543/pi_iteration_1_tool_call_2_hybrid_search.json
[2025-09-30T06:45:01.554271] [PI] Function hybrid_search executed successfully
[2025-09-30T06:45:01.556509] Saving JSON to bench_final/run1/medmcqa/medmcqa_543/pi_iteration_1_tool_result_2_hybrid_search.json
[2025-09-30T06:45:01.570315] [PI] Continuing reasoning with 1 function responses...
[2025-09-30T06:45:09.358606] [PI] Reasoning iteration 2
[2025-09-30T06:45:09.360194] [PI] Executing function call 1: hybrid_search
[2025-09-30T06:45:09.362219] [PI] Function arguments: {'query': 'ACR appropriateness criteria ultrasound appendicitis children', 'k': 5, 'faiss_weight': 0.4, 'bm25_weight': 0.6, 'use_rrf': True}
[2025-09-30T06:45:09.365044] Saving JSON to bench_final/run1/medmcqa/medmcqa_543/pi_iteration_2_tool_call_2_hybrid_search.json
[2025-09-30T06:45:57.494948] [PI] Function hybrid_search executed successfully
[2025-09-30T06:45:57.497081] Saving JSON to bench_final/run1/medmcqa/medmcqa_543/pi_iteration_2_tool_result_2_hybrid_search.json
[2025-09-30T06:45:57.514011] [PI] Continuing reasoning with 1 function responses...
[2025-09-30T06:46:03.889420] [PI] Reasoning iteration 3
[2025-09-30T06:46:03.894130] [PI] No function calls found in response
[2025-09-30T06:46:03.896033] [PI] No more function calls - research complete
[2025-09-30T06:46:03.904831] Saving text to bench_final/run1/medmcqa/medmcqa_543/pi_final_answer.txt
[2025-09-30T06:46:03.925851] [QUERYOME] Query completed successfully
