{
  "ptid_time": "032_S_0214_2007-10-25",
  "img_path": "/data/qiuhui/data/adni/images/032_S_0214/2007-10-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 34,841 mm³, 16.0% above the reference mean. With a Z-score of 0.38 (64.8th percentile), this represents normal volume ; hippocampal volume measures 7,063 mm³, 12.0% below the reference mean. With a Z-score of -1.20 (11.5th percentile), this represents mild atrophy; whole brain volume measures 1,189,430 mm³, 4.8% above the reference mean. With a Z-score of 0.68 (75.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,232 mm³, 24.2% below the reference mean. With a Z-score of -1.67 (4.7th percentile), this represents moderate atrophy; fusiform gyrus volume measures 17,951 mm³, 9.8% below the reference mean. With a Z-score of -0.82 (20.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,188 mm³, 5.5% below the reference mean. With a Z-score of -0.45 (32.6th percentile), this represents normal volume . ",
  "text_data": "Age is 66.6 years. Gender is Male. Education: 18 years. MMSE: 23.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.20, 11.5th percentile), and the entorhinal cortex exhibits moderate atrophy (Z-score -1.67, 4.7th percentile), both of which are key regions affected in Alzheimer's disease. The MMSE score of 23 suggests mild cognitive impairment, and the presence of two APOE4 alleles increases Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (likely prodromal Alzheimer's disease)  \n**Confidence:** **High**",
  "timestamp": "2025-07-26T04:53:44.666415"
}