{
  "ptid_time": "007_S_1339_2009-05-18",
  "img_path": "/data/qiuhui/data/adni/images/007_S_1339/2009-05-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 58,131 mm³, 57.3% above the reference mean. With a Z-score of 1.55 (93.9th percentile), this represents moderate enlargement; whole brain volume measures 1,067,980 mm³, 15.1% above the reference mean. With a Z-score of 1.81 (96.5th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 81.5 years. Gender is Female. Education: 13 years. MMSE: 21.0. Logical Memory: 0.0. APOEε4 alleles: 0.0. Biomarker levels: Pittsburgh compound B: 2.58 SUVR (significant elevated). ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "Reasoning: The ventricular volume is moderately enlarged (57.3% above reference mean, Z-score 1.55), which is often seen in neurodegenerative conditions like Alzheimer's. The MMSE score of 21 suggests cognitive impairment, but the whole brain volume is also moderately enlarged (15.1% above reference mean, Z-score 1.81), which is atypical for typical Alzheimer's progression. The absence of APOE4 reduces genetic risk but does not rule out dementia.  \n\nDiagnosis: **Dementia** (likely mixed or atypical subtype given brain volume preservation)  \nConfidence: **Medium** (due to conflicting imaging findings—ventricular enlargement suggests neurodegeneration, but preserved brain volume is unusual for typical AD)",
  "timestamp": "2025-07-25T21:55:45.143614"
}