{
  "ptid_time": "057_S_1007_2007-05-09",
  "img_path": "/data/qiuhui/data/adni/images/057_S_1007/2007-05-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 46,921 mm³, 21.8% above the reference mean. With a Z-score of 0.52 (69.9th percentile), this represents normal volume ; hippocampal volume measures 4,704 mm³, 37.8% below the reference mean. With a Z-score of -3.68 (0.0th percentile), this represents profound atrophy; whole brain volume measures 1,114,650 mm³, 3.3% above the reference mean. With a Z-score of 0.42 (66.4th percentile), this represents normal volume ; entorhinal cortex volume measures 2,698 mm³, 34.2% below the reference mean. With a Z-score of -2.32 (1.0th percentile), this represents significant atrophy; fusiform gyrus volume measures 16,193 mm³, 14.0% below the reference mean. With a Z-score of -1.20 (11.6th percentile), this represents mild atrophy; middle temporal gyrus volume measures 18,978 mm³, 11.1% below the reference mean. With a Z-score of -0.99 (16.0th percentile), this represents normal volume . ",
  "text_data": "Age is 72.8 years. Gender is Male. Education: 17 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal and entorhinal cortex volumes show profound and significant atrophy, respectively, which are strongly associated with Alzheimer's pathology. However, the MMSE score of 30 is normal, and there is no cognitive impairment reported. The absence of APOE4 reduces genetic risk.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Structural atrophy suggests preclinical Alzheimer's changes, but cognition remains intact.)",
  "timestamp": "2025-07-26T08:08:12.986717"
}