{
  "ptid_time": "128_S_2220_2012-01-20",
  "img_path": "/data/qiuhui/data/adni/images/128_S_2220/2012-01-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 42,469 mm³, 9.7% below the reference mean. With a Z-score of -0.28 (38.9th percentile), this represents normal volume ; hippocampal volume measures 6,001 mm³, 13.9% below the reference mean. With a Z-score of -1.20 (11.5th percentile), this represents mild atrophy; whole brain volume measures 1,030,400 mm³, 0.1% above the reference mean. With a Z-score of 0.02 (50.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,592 mm³, 15.7% above the reference mean. With a Z-score of 1.03 (84.8th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,385 mm³, 3.8% below the reference mean. With a Z-score of -0.33 (37.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,620 mm³, 7.2% above the reference mean. With a Z-score of 0.64 (74.0th percentile), this represents normal volume . ",
  "text_data": "Age is 83.0 years. Gender is Male. Education: 20 years. Handedness: Right. Race: White. Medical history: Neurologic; Dermatologic-Connective Tissue; Gastrointestinal; Renal-Genitourinary; Malignancy; Major Surgical Procedures. MMSE: 28.0. MoCA: 28.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.20, 11.5th percentile), which is concerning for early neurodegenerative changes. However, cognitive scores (MMSE 28, MoCA 28) are intact, and other brain regions (whole brain, ventricular, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. APOE4-negative status also reduces Alzheimer's risk.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Hippocampal atrophy is notable, but preserved cognition and normal biomarkers suggest no current impairment.)",
  "timestamp": "2025-07-26T14:00:44.076200"
}