{
  "ptid_time": "018_S_0055_2008-10-09",
  "img_path": "/data/qiuhui/data/adni/images/018_S_0055/2008-10-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 81,910 mm³, 112.7% above the reference mean. With a Z-score of 2.70 (99.7th percentile), this represents significant enlargement; whole brain volume measures 1,097,040 mm³, 1.6% above the reference mean. With a Z-score of 0.21 (58.4th percentile), this represents normal volume . ",
  "text_data": "Age is 78.5 years. Gender is Male. Education: 20 years. MMSE: 30.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is significantly enlarged (Z-score 2.70, 99.7th percentile), which is often associated with neurodegeneration, but the whole brain volume is normal (Z-score 0.21). The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Ventricular enlargement raises suspicion, but preserved cognition and normal brain volume suggest no current impairment.)",
  "timestamp": "2025-07-26T00:42:25.241919"
}