{
  "ptid_time": "011_S_0021_2013-10-17",
  "img_path": "/data/qiuhui/data/adni/images/011_S_0021/2013-10-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,453 mm³, 44.7% below the reference mean. With a Z-score of -1.21 (11.4th percentile), this represents mild atrophy; hippocampal volume measures 7,713 mm³, 18.8% above the reference mean. With a Z-score of 1.50 (93.4th percentile), this represents moderate enlargement; whole brain volume measures 922,547 mm³, 0.6% below the reference mean. With a Z-score of -0.07 (47.1th percentile), this represents normal volume . ",
  "text_data": "Age is 80.6 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild atrophy (Z-score -1.21), but hippocampal volume is moderately enlarged (Z-score 1.50), which is atypical for Alzheimer's. Whole brain volume is normal. Cognitive scores (MMSE 30, MoCA 28) are intact, and APOE4-negative status reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to conflicting hippocampal enlargement and mild ventricular atrophy, but strong cognitive performance suggests no impairment)",
  "timestamp": "2025-07-25T22:40:23.242554"
}