{
  "ptid_time": "127_S_6168_2020-02-26",
  "img_path": "/data/qiuhui/data/adni/images/127_S_6168/2020-02-26/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 65,005 mm³, 131.6% above the reference mean. With a Z-score of 3.01 (99.9th percentile), this represents profound enlargement; hippocampal volume measures 6,748 mm³, 5.2% below the reference mean. With a Z-score of -0.47 (31.8th percentile), this represents normal volume ; whole brain volume measures 940,890 mm³, 3.5% below the reference mean. With a Z-score of -0.44 (33.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,612 mm³, 1.7% below the reference mean. With a Z-score of -0.10 (45.9th percentile), this represents normal volume ; fusiform gyrus volume measures 17,752 mm³, 4.3% above the reference mean. With a Z-score of 0.40 (65.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,274 mm³, 11.0% above the reference mean. With a Z-score of 0.95 (83.0th percentile), this represents normal volume . ",
  "text_data": "Age is 78.0 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 0.98 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows profound ventricular enlargement (Z-score 3.01), which is strongly associated with neurodegeneration, but hippocampal and whole brain volumes are within normal limits (Z-scores -0.47 and -0.44, respectively). Cognitive scores (MMSE 30, MoCA 28) are intact, and there is no APOE4 risk allele.  \n\n**Diagnosis:** **Cognitively Normal (CN)**  \n**Confidence:** **Medium** (Ventricular enlargement suggests possible early neurodegenerative changes, but preserved cognition and normal hippocampal volume argue against MCI or dementia at this stage.)",
  "timestamp": "2025-07-26T13:30:14.987614"
}