{
  "ptid_time": "941_S_4187_2012-08-30",
  "img_path": "/data/qiuhui/data/adni/images/941_S_4187/2012-08-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,160 mm³, 49.5% below the reference mean. With a Z-score of -1.18 (12.0th percentile), this represents mild atrophy; hippocampal volume measures 8,555 mm³, 6.6% above the reference mean. With a Z-score of 0.66 (74.5th percentile), this represents normal volume ; whole brain volume measures 1,281,230 mm³, 12.9% above the reference mean. With a Z-score of 1.83 (96.6th percentile), this represents moderate enlargement; entorhinal cortex volume measures 4,318 mm³, 1.3% above the reference mean. With a Z-score of 0.09 (53.6th percentile), this represents normal volume ; fusiform gyrus volume measures 25,216 mm³, 26.7% above the reference mean. With a Z-score of 2.22 (98.7th percentile), this represents significant enlargement; middle temporal gyrus volume measures 25,256 mm³, 12.7% above the reference mean. With a Z-score of 1.05 (85.2th percentile), this represents mild enlargement. ",
  "text_data": "Age is 63.0 years. Gender is Male. Education: 16 years. MMSE: 25.0. MoCA: 24.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal or enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 25, MoCA 24) are slightly below optimal but not in the dementia range. No APOE4 risk allele is present.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Cognitive scores are borderline, but structural findings and lack of genetic risk suggest normal aging rather than pathology.)",
  "timestamp": "2025-07-26T17:35:14.779754"
}