{
  "ptid_time": "016_S_1138_2007-08-02",
  "img_path": "/data/qiuhui/data/adni/images/016_S_1138/2007-08-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,129 mm³, 7.0% above the reference mean. With a Z-score of 0.17 (56.6th percentile), this represents normal volume ; hippocampal volume measures 6,303 mm³, 21.5% below the reference mean. With a Z-score of -2.15 (1.6th percentile), this represents significant atrophy; whole brain volume measures 909,337 mm³, 19.8% below the reference mean. With a Z-score of -2.81 (0.2th percentile), this represents significant atrophy; entorhinal cortex volume measures 2,853 mm³, 33.1% below the reference mean. With a Z-score of -2.29 (1.1th percentile), this represents significant atrophy; fusiform gyrus volume measures 15,424 mm³, 22.5% below the reference mean. With a Z-score of -1.87 (3.1th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 15,584 mm³, 30.5% below the reference mean. With a Z-score of -2.51 (0.6th percentile), this represents significant atrophy. ",
  "text_data": "Age is 67.9 years. Gender is Male. Education: 12 years. MMSE: 25.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant atrophy in key Alzheimer's-related regions (hippocampus, entorhinal cortex, middle temporal gyrus) and whole brain volume, alongside mild cognitive impairment (MMSE 25). The presence of two APOE4 alleles further increases Alzheimer's risk.  \n\n**Diagnosis:** **Dementia (likely Alzheimer’s disease)**  \n**Confidence:** **High**",
  "timestamp": "2025-07-26T00:17:30.597718"
}