{
  "ptid_time": "027_S_6002_2018-02-16",
  "img_path": "/data/qiuhui/data/adni/images/027_S_6002/2018-02-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,202 mm³, 42.4% below the reference mean. With a Z-score of -1.01 (15.5th percentile), this represents mild atrophy; hippocampal volume measures 8,196 mm³, 8.4% above the reference mean. With a Z-score of 0.82 (79.4th percentile), this represents normal volume ; whole brain volume measures 1,008,430 mm³, 6.6% below the reference mean. With a Z-score of -0.85 (19.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,776 mm³, 16.5% above the reference mean. With a Z-score of 1.12 (86.8th percentile), this represents mild enlargement; fusiform gyrus volume measures 20,758 mm³, 10.2% above the reference mean. With a Z-score of 0.87 (80.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,865 mm³, 2.2% below the reference mean. With a Z-score of -0.20 (42.1th percentile), this represents normal volume . ",
  "text_data": "Age is 72.7 years. Gender is Male. Education: 16 years. MMSE: 30.0. MoCA: 25.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal or even slightly enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus). Cognitive testing (MMSE 30, MoCA 25) is borderline for MCI (MoCA <26 suggests possible impairment), but there is no significant structural atrophy to support dementia. APOE4-negative status reduces Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (MoCA suggests possible impairment, but structural findings are not strongly supportive of neurodegeneration; clinical correlation needed).",
  "timestamp": "2025-07-26T04:12:23.554652"
}