{
  "ptid_time": "018_S_4349_2012-11-28",
  "img_path": "/data/qiuhui/data/adni/images/018_S_4349/2012-11-28/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,649 mm³, 34.1% above the reference mean. With a Z-score of 0.78 (78.3th percentile), this represents normal volume ; hippocampal volume measures 7,904 mm³, 11.1% above the reference mean. With a Z-score of 1.02 (84.6th percentile), this represents mild enlargement; whole brain volume measures 1,191,940 mm³, 22.3% above the reference mean. With a Z-score of 2.81 (99.7th percentile), this represents significant enlargement; entorhinal cortex volume measures 4,655 mm³, 26.7% above the reference mean. With a Z-score of 1.64 (95.0th percentile), this represents moderate enlargement; fusiform gyrus volume measures 19,331 mm³, 13.6% above the reference mean. With a Z-score of 1.24 (89.3th percentile), this represents mild enlargement; middle temporal gyrus volume measures 23,345 mm³, 21.8% above the reference mean. With a Z-score of 1.89 (97.1th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 72.4 years. Gender is Female. Education: 16 years. MMSE: 29.0. MoCA: 25.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows significant enlargement in multiple regions (whole brain, entorhinal cortex, middle temporal gyrus) with no atrophy, which is atypical for Alzheimer's. Cognitive scores (MMSE 29, MoCA 25) are within normal to mild cognitive concern range, and APOE4-negative status further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to MoCA score slightly below typical cutoff but no structural or genetic support for impairment)",
  "timestamp": "2025-07-26T00:57:13.781407"
}