{
  "ptid_time": "053_S_2396_2012-07-30",
  "img_path": "/data/qiuhui/data/adni/images/053_S_2396/2012-07-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 49,461 mm³, 76.2% above the reference mean. With a Z-score of 1.75 (96.0th percentile), this represents moderate enlargement; hippocampal volume measures 8,317 mm³, 16.9% above the reference mean. With a Z-score of 1.55 (93.9th percentile), this represents moderate enlargement; whole brain volume measures 1,014,410 mm³, 4.1% above the reference mean. With a Z-score of 0.51 (69.6th percentile), this represents normal volume . ",
  "text_data": "Age is 71.2 years. Gender is Female. Education: 14 years. MMSE: 27.0. MoCA: 24.0. Logical Memory: 3.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is moderately enlarged (76.2% above mean, Z-score 1.75), which can indicate atrophy, but hippocampal volume is also moderately enlarged (16.9% above mean, Z-score 1.55), which is atypical for Alzheimer’s. Whole brain volume is normal. Cognitive scores (MMSE 27, MoCA 24) are borderline for MCI but not dementia. APOE4-negative status reduces Alzheimer’s risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to conflicting hippocampal enlargement and borderline cognitive scores)",
  "timestamp": "2025-07-26T07:58:11.615223"
}