{
  "ptid_time": "036_S_0656_2008-01-22",
  "img_path": "/data/qiuhui/data/adni/images/036_S_0656/2008-01-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,308 mm³, 37.7% below the reference mean. With a Z-score of -1.09 (13.7th percentile), this represents mild atrophy; hippocampal volume measures 5,974 mm³, 14.3% below the reference mean. With a Z-score of -1.23 (10.9th percentile), this represents mild atrophy; whole brain volume measures 959,926 mm³, 6.7% below the reference mean. With a Z-score of -0.88 (18.9th percentile), this represents normal volume ; entorhinal cortex volume measures 2,764 mm³, 30.4% below the reference mean. With a Z-score of -1.99 (2.3th percentile), this represents moderate atrophy; fusiform gyrus volume measures 16,066 mm³, 11.1% below the reference mean. With a Z-score of -0.96 (16.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,117 mm³, 9.6% above the reference mean. With a Z-score of 0.86 (80.6th percentile), this represents normal volume . ",
  "text_data": "Age is 84.0 years. Gender is Male. Education: 13 years. MMSE: 22.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild to moderate atrophy in key Alzheimer's-related regions (hippocampus, entorhinal cortex) alongside mild ventricular enlargement, suggesting neurodegeneration. The MMSE score of 22 indicates cognitive impairment, and the presence of one APOE4 allele increases Alzheimer's risk.  \n\n**Diagnosis:** **Dementia** (likely Alzheimer’s disease)  \n**Confidence:** **Medium** (clinical correlation with biomarkers would strengthen certainty).",
  "timestamp": "2025-07-26T06:02:25.562658"
}