{
  "ptid_time": "014_S_0520_2007-05-23",
  "img_path": "/data/qiuhui/data/adni/images/014_S_0520/2007-05-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,270 mm³, 34.9% below the reference mean. With a Z-score of -0.80 (21.2th percentile), this represents normal volume ; whole brain volume measures 1,115,440 mm³, 14.4% above the reference mean. With a Z-score of 1.82 (96.5th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 78.7 years. Gender is Female. Education: 16 years. MMSE: 29.0. Logical Memory: 15.0. APOEε4 alleles: 2.0. Biomarker levels: Amyloid beta: 586.10 pg/mL (mild reduced); Total tau: 276.50 pg/mL (normal ); Phosphorylated tau: 24.30 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient has normal ventricular volume and moderate whole brain enlargement, which is atypical for Alzheimer's. Cognitive performance (MMSE 29) is intact, and biomarkers (Aβ mildly reduced, normal tau) do not strongly support AD pathology. APOE4 homozygosity increases AD risk but is not diagnostic.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to conflicting factors—APOE4 risk vs. normal cognition and imaging)",
  "timestamp": "2025-07-25T23:41:19.842236"
}