{
  "ptid_time": "068_S_0872_2007-06-15",
  "img_path": "/data/qiuhui/data/adni/images/068_S_0872/2007-06-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,417 mm³, 36.6% below the reference mean. With a Z-score of -0.88 (19.0th percentile), this represents normal volume ; hippocampal volume measures 6,508 mm³, 13.9% below the reference mean. With a Z-score of -1.36 (8.7th percentile), this represents mild atrophy; whole brain volume measures 1,172,310 mm³, 8.6% above the reference mean. With a Z-score of 1.12 (86.8th percentile), this represents mild enlargement; entorhinal cortex volume measures 3,937 mm³, 4.0% below the reference mean. With a Z-score of -0.27 (39.3th percentile), this represents normal volume ; fusiform gyrus volume measures 16,900 mm³, 10.3% below the reference mean. With a Z-score of -0.88 (19.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,202 mm³, 8.7% above the reference mean. With a Z-score of 0.78 (78.4th percentile), this represents normal volume . ",
  "text_data": "Age is 70.1 years. Gender is Male. Education: 17 years. MMSE: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The hippocampal volume shows mild atrophy (Z-score -1.36, 8.7th percentile), which is a key biomarker for Alzheimer's pathology, while other regions are largely within normal ranges. The MMSE score of 26 is borderline but not definitively impaired, and the absence of APOE4 reduces genetic risk.  \nDiagnosis: **MCI (Mild Cognitive Impairment)**  \nConfidence: **Medium** (Hippocampal atrophy suggests early neurodegeneration, but clinical symptoms are not severe enough for dementia, and other biomarkers are inconclusive.)",
  "timestamp": "2025-07-26T08:51:40.766365"
}