{
  "ptid_time": "094_S_4234_2012-04-25",
  "img_path": "/data/qiuhui/data/adni/images/094_S_4234/2012-04-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,182 mm³, 4.3% above the reference mean. With a Z-score of 0.10 (54.1th percentile), this represents normal volume ; hippocampal volume measures 6,974 mm³, 7.7% below the reference mean. With a Z-score of -0.76 (22.5th percentile), this represents normal volume ; whole brain volume measures 1,118,490 mm³, 3.6% above the reference mean. With a Z-score of 0.47 (68.1th percentile), this represents normal volume . ",
  "text_data": "Age is 70.6 years. Gender is Male. Education: 13 years. MMSE: 29.0. MoCA: 27.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is slightly reduced (7.7% below mean, Z-score -0.76), but still within the normal range. Cognitive scores (MMSE 29, MoCA 27) are intact, and other brain volumes are normal. APOE4 carrier status increases Alzheimer’s risk but does not confirm pathology.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to borderline hippocampal volume but preserved cognition)",
  "timestamp": "2025-07-26T10:29:46.257665"
}