{
  "ptid_time": "037_S_4750_2012-07-02",
  "img_path": "/data/qiuhui/data/adni/images/037_S_4750/2012-07-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,537 mm³, 41.7% below the reference mean. With a Z-score of -1.13 (13.0th percentile), this represents mild atrophy; hippocampal volume measures 6,714 mm³, 3.4% above the reference mean. With a Z-score of 0.27 (60.6th percentile), this represents normal volume ; whole brain volume measures 992,145 mm³, 6.9% above the reference mean. With a Z-score of 0.83 (79.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,125 mm³, 19.1% above the reference mean. With a Z-score of 1.03 (84.9th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,215 mm³, 6.9% above the reference mean. With a Z-score of 0.52 (69.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,038 mm³, 11.0% below the reference mean. With a Z-score of -0.98 (16.3th percentile), this represents normal volume . ",
  "text_data": "Age is 83.7 years. Gender is Female. Education: 18 years. MMSE: 29.0. MoCA: 29.0. Logical Memory: 6.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.01 SUVR (normal ); Total tau: 176.30 pg/mL (normal ); Phosphorylated tau: 14.00 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal or even slightly enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus). Cognitive scores (MMSE 29, MoCA 29) are intact, and biomarkers (normal AV45, T-tau, reduced P-tau) do not strongly suggest Alzheimer’s pathology. APOE4-negative status further reduces Alzheimer’s risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T06:48:12.534913"
}