{
  "ptid_time": "128_S_4671_2012-12-09",
  "img_path": "/data/qiuhui/data/adni/images/128_S_4671/2012-12-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 81,557 mm³, 73.5% above the reference mean. With a Z-score of 2.13 (98.4th percentile), this represents significant enlargement; hippocampal volume measures 7,655 mm³, 9.9% above the reference mean. With a Z-score of 0.85 (80.3th percentile), this represents normal volume ; whole brain volume measures 1,116,740 mm³, 8.5% above the reference mean. With a Z-score of 1.12 (86.8th percentile), this represents mild enlargement; entorhinal cortex volume measures 3,416 mm³, 13.9% below the reference mean. With a Z-score of -0.91 (18.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,861 mm³, 1.1% below the reference mean. With a Z-score of -0.10 (46.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,385 mm³, 11.0% above the reference mean. With a Z-score of 0.98 (83.7th percentile), this represents normal volume . ",
  "text_data": "Age is 82.3 years. Gender is Male. Education: 15 years. MMSE: 29.0. MoCA: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is significantly enlarged (Z-score 2.13), which is often associated with neurodegeneration, while the entorhinal cortex is mildly reduced (Z-score -0.91). However, hippocampal volume is normal, and cognitive scores (MMSE 29, MoCA 28) are intact, suggesting no significant functional impairment.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to conflicting structural findings—ventricular enlargement suggests possible early neurodegeneration, but preserved cognition and hippocampal volume argue against MCI/dementia at this stage).",
  "timestamp": "2025-07-26T14:04:35.724371"
}