{
  "ptid_time": "023_S_0031_2018-04-17",
  "img_path": "/data/qiuhui/data/adni/images/023_S_0031/2018-04-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 43,208 mm³, 3.9% above the reference mean. With a Z-score of 0.61 (72.8th percentile), this represents normal volume ; whole brain volume measures 914,628 mm³, 0.5% above the reference mean. With a Z-score of 0.06 (52.4th percentile), this represents normal volume . ",
  "text_data": "Age is 90.2 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 21.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.50 SUVR (profound elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain volumes (ventricular and whole brain) are within normal ranges, and cognitive scores (MMSE 30, MoCA 27) are intact for age. The absence of APOE4 and elevated AV45 (amyloid burden) suggests amyloid pathology but no significant cognitive impairment.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to elevated AV45 despite normal cognition, which may indicate preclinical Alzheimer's but not yet MCI/dementia)",
  "timestamp": "2025-07-26T02:27:44.964512"
}