{
  "ptid_time": "021_S_4254_2017-04-05",
  "img_path": "/data/qiuhui/data/adni/images/021_S_4254/2017-04-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,115 mm³, 10.8% below the reference mean. With a Z-score of -1.69 (4.5th percentile), this represents moderate atrophy; whole brain volume measures 847,420 mm³, 6.9% below the reference mean. With a Z-score of -0.77 (22.2th percentile), this represents normal volume . ",
  "text_data": "Age is 91.4 years. Gender is Female. Education: 12 years. MMSE: 26.0. MoCA: 25.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.16 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows moderate ventricular atrophy (Z-score -1.69) but normal whole brain volume (Z-score -0.77). Cognitive scores (MMSE 26, MoCA 25) are within normal limits for age, and amyloid PET (AV45) is normal, suggesting no significant Alzheimer's pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to moderate ventricular atrophy, but normal cognition and amyloid status support CN)",
  "timestamp": "2025-07-26T01:43:01.056068"
}