{
  "ptid_time": "130_S_4605_2013-03-27",
  "img_path": "/data/qiuhui/data/adni/images/130_S_4605/2013-03-27/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 39,330 mm³, 6.4% above the reference mean. With a Z-score of 0.17 (56.9th percentile), this represents normal volume ; hippocampal volume measures 6,102 mm³, 6.1% below the reference mean. With a Z-score of -0.48 (31.4th percentile), this represents normal volume ; whole brain volume measures 1,022,170 mm³, 10.1% above the reference mean. With a Z-score of 1.22 (88.8th percentile), this represents mild enlargement. ",
  "text_data": "Age is 85.7 years. Gender is Female. Education: 17 years. MMSE: 29.0. MoCA: 24.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is slightly below the reference mean but still within the normal range (Z-score -0.48, 31.4th percentile). Ventricular and whole brain volumes are normal or mildly enlarged. Cognitive scores (MMSE 29, MoCA 24) are borderline for MCI (MoCA <26 suggests possible impairment), but structural imaging does not strongly support neurodegeneration. APOE4-negative status reduces Alzheimer’s risk.  \n\n**Diagnosis:** **MCI** (mild cognitive impairment, likely non-amnestic given intact MMSE but borderline MoCA).  \n**Confidence:** **Medium** (cognitive scores suggest impairment, but imaging lacks clear atrophy).",
  "timestamp": "2025-07-26T14:50:06.935247"
}