{
  "ptid_time": "029_S_0843_2007-05-16",
  "img_path": "/data/qiuhui/data/adni/images/029_S_0843/2007-05-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 70,994 mm³, 84.3% above the reference mean. With a Z-score of 2.02 (97.8th percentile), this represents significant enlargement; hippocampal volume measures 7,496 mm³, 0.8% below the reference mean. With a Z-score of -0.08 (46.8th percentile), this represents normal volume ; whole brain volume measures 1,056,720 mm³, 2.1% below the reference mean. With a Z-score of -0.27 (39.3th percentile), this represents normal volume ; entorhinal cortex volume measures 5,906 mm³, 44.0% above the reference mean. With a Z-score of 2.99 (99.9th percentile), this represents significant enlargement; fusiform gyrus volume measures 20,910 mm³, 11.0% above the reference mean. With a Z-score of 0.94 (82.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,730 mm³, 2.9% below the reference mean. With a Z-score of -0.26 (39.9th percentile), this represents normal volume . ",
  "text_data": "Age is 71.0 years. Gender is Male. Education: 16 years. MMSE: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant ventricular enlargement (Z-score 2.02) and entorhinal cortex enlargement (Z-score 2.99), which are atypical for typical Alzheimer's progression (usually atrophy). The hippocampal volume is normal, and MMSE is borderline (26/30). APOE4-negative status reduces Alzheimer's risk.  \n**Diagnosis:** **MCI** (due to borderline MMSE and atypical structural changes, but not meeting dementia criteria).  \n**Confidence:** **Medium** (unusual imaging findings complicate interpretation, but cognitive score suggests MCI).",
  "timestamp": "2025-07-26T04:17:03.277829"
}