{
  "ptid_time": "031_S_4005_2011-10-06",
  "img_path": "/data/qiuhui/data/adni/images/031_S_4005/2011-10-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 39,798 mm³, 3.3% above the reference mean. With a Z-score of 0.08 (53.2th percentile), this represents normal volume ; hippocampal volume measures 7,035 mm³, 6.9% below the reference mean. With a Z-score of -0.68 (24.9th percentile), this represents normal volume ; whole brain volume measures 1,175,930 mm³, 8.9% above the reference mean. With a Z-score of 1.16 (87.7th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,201 mm³, 2.4% above the reference mean. With a Z-score of 0.17 (56.6th percentile), this represents normal volume ; fusiform gyrus volume measures 23,409 mm³, 24.3% above the reference mean. With a Z-score of 2.07 (98.1th percentile), this represents significant enlargement; middle temporal gyrus volume measures 22,553 mm³, 5.7% above the reference mean. With a Z-score of 0.51 (69.5th percentile), this represents normal volume . ",
  "text_data": "Age is 71.0 years. Gender is Male. Education: 16 years. MMSE: 26.0. MoCA: 25.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The hippocampal volume is slightly below the reference mean (Z-score -0.68, 24.9th percentile), but still within the normal range. Cognitive scores (MMSE 26, MoCA 25) are borderline but not definitively impaired. No other significant atrophy is noted, and some regions (fusiform gyrus) show enlargement. APOE4 carrier status increases Alzheimer’s risk but does not confirm pathology.  \nDiagnosis: **CN (Cognitively Normal)**  \nConfidence: **Medium** (due to borderline cognitive scores and APOE4 status, but no clear structural or functional impairment)",
  "timestamp": "2025-07-26T04:43:23.381987"
}