{
  "ptid_time": "020_S_5203_2017-12-13",
  "img_path": "/data/qiuhui/data/adni/images/020_S_5203/2017-12-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 46,654 mm³, 66.2% above the reference mean. With a Z-score of 1.52 (93.5th percentile), this represents moderate enlargement; whole brain volume measures 1,098,370 mm³, 12.7% above the reference mean. With a Z-score of 1.60 (94.5th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 71.0 years. Gender is Female. Education: 19 years. MMSE: 28.0. MoCA: 30.0. Logical Memory: 20.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.15 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is moderately enlarged (66.2% above reference mean, Z-score 1.52), which can indicate atrophy, but the whole brain volume is also moderately enlarged (12.7% above reference mean, Z-score 1.60), suggesting preserved brain structure. Cognitive scores (MMSE 28, MoCA 30) are intact, and amyloid PET (AV45) is normal, with no APOE4 risk allele.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (ventricular enlargement could be age-related, but cognitive performance and biomarkers do not suggest pathology)",
  "timestamp": "2025-07-26T01:17:20.631187"
}