{
  "ptid_time": "109_S_1114_2008-07-15",
  "img_path": "/data/qiuhui/data/adni/images/109_S_1114/2008-07-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 33,136 mm³, 18.1% above the reference mean. With a Z-score of 0.41 (66.0th percentile), this represents normal volume ; whole brain volume measures 793,962 mm³, 18.5% below the reference mean. With a Z-score of -2.33 (1.0th percentile), this represents significant atrophy. ",
  "text_data": "Age is 79.8 years. Gender is Female. Education: 12 years. MMSE: 27.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The patient shows significant whole brain atrophy (Z-score -2.33, 1st percentile) but normal ventricular volume. The MMSE score of 27 is within the normal range, and the absence of APOE4 reduces genetic risk. However, the degree of atrophy is concerning for early neurodegenerative changes.  \nDiagnosis: **Mild Cognitive Impairment (MCI)**  \nConfidence: **Medium** (Atrophy is severe, but cognitive scores are still normal, suggesting early-stage MCI rather than dementia.)",
  "timestamp": "2025-07-26T11:30:00.131048"
}