{
  "ptid_time": "041_S_4629_2012-04-17",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4629/2012-04-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 46,834 mm³, 21.6% above the reference mean. With a Z-score of 0.52 (69.8th percentile), this represents normal volume ; hippocampal volume measures 7,319 mm³, 3.2% below the reference mean. With a Z-score of -0.31 (37.8th percentile), this represents normal volume ; whole brain volume measures 1,003,140 mm³, 7.1% below the reference mean. With a Z-score of -0.92 (18.0th percentile), this represents normal volume . ",
  "text_data": "Age is 70.7 years. Gender is Male. Education: 18 years. Handedness: Right. Race: White. Medical history: Cardiovascular; Musculoskeletal; Major Surgical Procedures. MMSE: 29.0. MoCA: 28.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.12 SUVR (normal ); Amyloid beta: 1088.00 pg/mL (normal ); Total tau: 114.80 pg/mL (moderate reduced); Phosphorylated tau: 10.33 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The brain volumes (ventricular, hippocampal, and whole brain) are within normal ranges, and cognitive scores (MMSE and MoCA) are high, indicating no significant cognitive impairment. Biomarkers (Aβ normal, AV45 normal) and genetic risk (APOE4 negative) further support the absence of Alzheimer's pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T07:19:15.857970"
}