{
  "ptid_time": "072_S_2026_2010-07-26",
  "img_path": "/data/qiuhui/data/adni/images/072_S_2026/2010-07-26/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 64,876 mm³, 75.5% above the reference mean. With a Z-score of 2.04 (97.9th percentile), this represents significant enlargement; hippocampal volume measures 6,254 mm³, 3.7% below the reference mean. With a Z-score of -0.30 (38.3th percentile), this represents normal volume ; whole brain volume measures 924,874 mm³, 0.4% below the reference mean. With a Z-score of -0.04 (48.3th percentile), this represents normal volume . ",
  "text_data": "Age is 82.5 years. Gender is Female. Education: 14 years. Handedness: Left. Race: White. Medical history: Psychiatric; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Respiratory; Musculoskeletal; Endocrine-Metabolic; Gastrointestinal; Allergies or Drug Sensitivities; Major Surgical Procedures. MMSE: 28.0. MoCA: 27.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.00 SUVR (normal ); Amyloid beta: 1079.00 pg/mL (normal ); Total tau: 113.00 pg/mL (moderate reduced); Phosphorylated tau: 9.42 pg/mL (moderate reduced). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The ventricular volume is significantly enlarged (75.5% above mean, Z-score 2.04), which is often associated with brain atrophy, but hippocampal and whole brain volumes are within normal limits. Cognitive scores (MMSE 28, MoCA 27) are intact, and biomarkers (Aβ normal, reduced tau) do not strongly suggest Alzheimer's pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (ventricular enlargement is notable, but other markers do not support MCI or dementia)",
  "timestamp": "2025-07-26T09:09:28.378617"
}