{
  "ptid_time": "037_S_4410_2012-06-20",
  "img_path": "/data/qiuhui/data/adni/images/037_S_4410/2012-06-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,653 mm³, 29.9% below the reference mean. With a Z-score of -0.75 (22.7th percentile), this represents normal volume ; hippocampal volume measures 6,318 mm³, 17.8% below the reference mean. With a Z-score of -2.00 (2.3th percentile), this represents moderate atrophy; whole brain volume measures 962,554 mm³, 6.5% below the reference mean. With a Z-score of -0.81 (21.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,162 mm³, 18.8% below the reference mean. With a Z-score of -1.45 (7.3th percentile), this represents mild atrophy; fusiform gyrus volume measures 18,302 mm³, 0.5% above the reference mean. With a Z-score of 0.06 (52.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,008 mm³, 7.4% below the reference mean. With a Z-score of -0.65 (25.6th percentile), this represents normal volume . ",
  "text_data": "Age is 69.6 years. Gender is Female. Education: 14 years. MMSE: 29.0. MoCA: 25.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows moderate atrophy (Z-score -2.00, 2.3rd percentile), and the entorhinal cortex shows mild atrophy (Z-score -1.45, 7.3rd percentile), both of which are key regions affected in Alzheimer's disease. However, cognitive scores (MMSE 29, MoCA 25) are near-normal, suggesting no significant functional impairment.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Structural atrophy is present, but cognitive performance is borderline normal, and APOE4-negative status reduces Alzheimer's risk.)",
  "timestamp": "2025-07-26T06:46:11.712249"
}