{
  "ptid_time": "057_S_1007_2009-11-04",
  "img_path": "/data/qiuhui/data/adni/images/057_S_1007/2009-11-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 52,823 mm³, 37.1% above the reference mean. With a Z-score of 0.89 (81.3th percentile), this represents normal volume ; hippocampal volume measures 4,564 mm³, 39.6% below the reference mean. With a Z-score of -3.87 (0.0th percentile), this represents profound atrophy; whole brain volume measures 1,118,000 mm³, 3.6% above the reference mean. With a Z-score of 0.46 (67.9th percentile), this represents normal volume ; entorhinal cortex volume measures 2,419 mm³, 41.0% below the reference mean. With a Z-score of -2.78 (0.3th percentile), this represents significant atrophy; fusiform gyrus volume measures 17,624 mm³, 6.4% below the reference mean. With a Z-score of -0.55 (29.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,115 mm³, 5.7% below the reference mean. With a Z-score of -0.52 (30.3th percentile), this represents normal volume . ",
  "text_data": "Age is 75.3 years. Gender is Male. Education: 17 years. MMSE: 26.0. Logical Memory: 0.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The data shows profound atrophy in the hippocampus (Z-score -3.87) and significant atrophy in the entorhinal cortex (Z-score -2.78), both key regions affected in Alzheimer's disease. Despite normal MMSE (26/30), the structural changes suggest neurodegeneration.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (likely prodromal Alzheimer’s given hippocampal/entorhinal atrophy).  \n\n**Confidence:** **Medium** (MMSE is borderline, but imaging strongly supports MCI; APOE4-negative status slightly reduces certainty for AD pathology).",
  "timestamp": "2025-07-26T08:08:41.282286"
}