{
  "ptid_time": "131_S_0123_2010-02-05",
  "img_path": "/data/qiuhui/data/adni/images/131_S_0123/2010-02-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 34,134 mm³, 11.4% below the reference mean. With a Z-score of -0.27 (39.3th percentile), this represents normal volume ; whole brain volume measures 904,939 mm³, 16.2% below the reference mean. With a Z-score of -2.10 (1.8th percentile), this represents significant atrophy. ",
  "text_data": "Age is 77.3 years. Gender is Male. Education: 20 years. MMSE: 30.0. Logical Memory: 24.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 1460.00 pg/mL (mild elevated); Total tau: 315.50 pg/mL (normal ); Phosphorylated tau: 30.01 pg/mL (mild elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows significant whole brain atrophy (Z-score -2.10, 1.8th percentile) but normal ventricular volume. Despite mild elevations in Aβ and P-tau, cognitive performance (MMSE 30) remains intact.  \n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (biomarker evidence of neurodegeneration but preserved cognition)  \n**Confidence:** **Medium** (MMSE is insensitive to early decline; clinical correlation needed)",
  "timestamp": "2025-07-26T14:59:30.754598"
}