{
  "ptid_time": "137_S_0994_2009-12-01",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0994/2009-12-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 27,255 mm³, 46.4% above the reference mean. With a Z-score of 1.33 (90.8th percentile), this represents mild enlargement; hippocampal volume measures 6,274 mm³, 19.6% below the reference mean. With a Z-score of -2.73 (0.3th percentile), this represents significant atrophy; whole brain volume measures 881,060 mm³, 15.3% below the reference mean. With a Z-score of -1.84 (3.3th percentile), this represents moderate atrophy; entorhinal cortex volume measures 3,372 mm³, 8.8% below the reference mean. With a Z-score of -0.68 (24.7th percentile), this represents normal volume ; fusiform gyrus volume measures 11,461 mm³, 37.8% below the reference mean. With a Z-score of -3.43 (0.0th percentile), this represents profound atrophy; middle temporal gyrus volume measures 17,828 mm³, 13.2% below the reference mean. With a Z-score of -1.09 (13.9th percentile), this represents mild atrophy. ",
  "text_data": "Age is 58.1 years. Gender is Female. Education: 18 years. MMSE: 25.0. Logical Memory: 0.0. APOEε4 alleles: 1.0. Biomarker levels: Pittsburgh compound B: 2.13 SUVR (mild elevated). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant atrophy in the hippocampus (-2.73 Z-score, 0.3rd percentile) and profound atrophy in the fusiform gyrus (-3.43 Z-score, 0.0th percentile), both key regions affected in Alzheimer's disease. The MMSE score of 25 suggests mild cognitive impairment, and the presence of one APOE4 allele increases Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (likely prodromal Alzheimer's given the biomarker profile).  \n\n**Confidence:** **High** (due to clear structural atrophy in AD-vulnerable regions and borderline MMSE).",
  "timestamp": "2025-07-26T16:23:03.980383"
}