{
  "ptid_time": "037_S_5126_2014-05-05",
  "img_path": "/data/qiuhui/data/adni/images/037_S_5126/2014-05-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 53,479 mm³, 139.4% above the reference mean. With a Z-score of 3.49 (100.0th percentile), this represents profound enlargement; hippocampal volume measures 7,099 mm³, 7.6% below the reference mean. With a Z-score of -0.86 (19.6th percentile), this represents normal volume ; whole brain volume measures 1,072,940 mm³, 4.3% above the reference mean. With a Z-score of 0.53 (70.2th percentile), this represents normal volume . ",
  "text_data": "Age is 69.5 years. Gender is Female. Education: 12 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is significantly enlarged (Z-score 3.49), which is a strong indicator of neurodegeneration, but hippocampal and whole brain volumes are within normal ranges. Cognitive scores (MMSE 30, MoCA 30) are unimpaired, and there is no APOE4 risk allele.  \n\n**Diagnosis:** **Cognitively Normal (CN)**  \n**Confidence:** **Medium** (ventricular enlargement suggests possible early neurodegenerative changes, but cognitive performance remains intact).",
  "timestamp": "2025-07-26T06:49:46.869556"
}