{
  "ptid_time": "031_S_4021_2012-04-26",
  "img_path": "/data/qiuhui/data/adni/images/031_S_4021/2012-04-26/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 53,954 mm³, 79.7% above the reference mean. With a Z-score of 1.89 (97.1th percentile), this represents moderate enlargement; hippocampal volume measures 7,611 mm³, 5.2% below the reference mean. With a Z-score of -0.52 (30.2th percentile), this represents normal volume ; whole brain volume measures 1,084,980 mm³, 4.4% below the reference mean. With a Z-score of -0.62 (26.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,586 mm³, 15.9% below the reference mean. With a Z-score of -1.10 (13.6th percentile), this represents mild atrophy; fusiform gyrus volume measures 20,337 mm³, 2.2% above the reference mean. With a Z-score of 0.18 (57.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,149 mm³, 5.6% below the reference mean. With a Z-score of -0.46 (32.1th percentile), this represents normal volume . ",
  "text_data": "Age is 67.5 years. Gender is Male. Education: 20 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows moderate ventricular enlargement and mild entorhinal cortex atrophy, but hippocampal and whole brain volumes are within normal ranges. Cognitive scores (MMSE 30, MoCA 29) are intact, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (structural changes may precede symptoms, but cognitive performance is currently unimpaired)",
  "timestamp": "2025-07-26T04:44:32.081766"
}