{
  "ptid_time": "002_S_1070_2008-08-13",
  "img_path": "/data/qiuhui/data/adni/images/002_S_1070/2008-08-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 53,711 mm³, 39.4% above the reference mean. With a Z-score of 0.94 (82.8th percentile), this represents normal volume ; hippocampal volume measures 8,106 mm³, 7.2% above the reference mean. With a Z-score of 0.71 (76.0th percentile), this represents normal volume ; whole brain volume measures 1,074,060 mm³, 0.5% below the reference mean. With a Z-score of -0.06 (47.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,429 mm³, 16.4% below the reference mean. With a Z-score of -1.11 (13.3th percentile), this represents mild atrophy; fusiform gyrus volume measures 13,285 mm³, 29.5% below the reference mean. With a Z-score of -2.51 (0.6th percentile), this represents significant atrophy; middle temporal gyrus volume measures 16,127 mm³, 24.4% below the reference mean. With a Z-score of -2.20 (1.4th percentile), this represents significant atrophy. ",
  "text_data": "Age is 75.1 years. Gender is Male. Education: 14 years. MMSE: 23.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The patient shows significant atrophy in the fusiform gyrus and middle temporal gyrus, which are regions commonly affected in Alzheimer's disease. The MMSE score of 23 suggests mild cognitive impairment, but the absence of APOE4 reduces genetic risk.  \n**Diagnosis:** **MCI** (Mild Cognitive Impairment)  \n**Confidence:** **Medium** (due to conflicting indicators—significant atrophy in key regions but normal hippocampal volume and no APOE4 risk allele)",
  "timestamp": "2025-07-25T20:10:26.289053"
}