{
  "ptid_time": "168_S_6619_2020-12-07",
  "img_path": "/data/qiuhui/data/adni/images/168_S_6619/2020-12-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 62,023 mm³, 61.0% above the reference mean. With a Z-score of 1.46 (92.8th percentile), this represents mild enlargement; hippocampal volume measures 7,444 mm³, 1.5% below the reference mean. With a Z-score of -0.15 (44.1th percentile), this represents normal volume ; whole brain volume measures 1,038,330 mm³, 3.8% below the reference mean. With a Z-score of -0.49 (31.1th percentile), this represents normal volume ; entorhinal cortex volume measures 4,969 mm³, 21.2% above the reference mean. With a Z-score of 1.44 (92.5th percentile), this represents mild enlargement; fusiform gyrus volume measures 18,046 mm³, 4.2% below the reference mean. With a Z-score of -0.36 (36.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,253 mm³, 5.1% below the reference mean. With a Z-score of -0.46 (32.4th percentile), this represents normal volume . ",
  "text_data": "Age is 73.9 years. Gender is Male. Education: 12 years. MMSE: 29.0. MoCA: 22.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is mildly enlarged (61.0% above mean, Z=1.46), which can be associated with atrophy, but hippocampal volume is normal (Z=-0.15). The MMSE is intact (29/30), but the MoCA (22/30) suggests mild cognitive impairment (MCI). No APOE4 allele reduces Alzheimer's genetic risk.  \n**Diagnosis:** **MCI** (mild cognitive impairment, likely non-amnestic given intact hippocampal volume)  \n**Confidence:** **Medium** (MoCA supports MCI, but structural changes are mild and not strongly Alzheimer's-pattern)",
  "timestamp": "2025-07-26T17:22:41.935352"
}