{
  "ptid_time": "127_S_4198_2012-09-06",
  "img_path": "/data/qiuhui/data/adni/images/127_S_4198/2012-09-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,318 mm³, 43.6% above the reference mean. With a Z-score of 1.00 (84.1th percentile), this represents normal volume ; whole brain volume measures 970,440 mm³, 0.4% below the reference mean. With a Z-score of -0.05 (47.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,191 mm³, 13.1% below the reference mean. With a Z-score of -0.81 (21.0th percentile), this represents normal volume ; fusiform gyrus volume measures 16,834 mm³, 1.1% below the reference mean. With a Z-score of -0.10 (46.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,183 mm³, 10.5% above the reference mean. With a Z-score of 0.91 (81.9th percentile), this represents normal volume . ",
  "text_data": "Age is 79.4 years. Gender is Female. Education: 16 years. MMSE: 29.0. MoCA: 26.0. Logical Memory: 11.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain volume measurements are largely within normal ranges, with only the entorhinal cortex showing a mild reduction (13.1% below reference mean, Z-score -0.81). Cognitive scores (MMSE 29, MoCA 26) are strong, though the MoCA is slightly below the typical cutoff for normal cognition (≥26). APOE4 carrier status increases Alzheimer's risk but does not confirm pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to borderline MoCA and mild entorhinal atrophy, but overall preserved cognition)",
  "timestamp": "2025-07-26T13:15:19.589930"
}