{
  "ptid_time": "941_S_1203_2007-10-13",
  "img_path": "/data/qiuhui/data/adni/images/941_S_1203/2007-10-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,838 mm³, 30.2% below the reference mean. With a Z-score of -0.88 (19.1th percentile), this represents normal volume ; whole brain volume measures 876,097 mm³, 14.9% below the reference mean. With a Z-score of -1.95 (2.6th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 83.8 years. Gender is Male. Education: 15 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The patient shows moderate whole brain atrophy (Z-score -1.95, 2.6th percentile) but normal ventricular volume. Despite being 83.8 years old, the MMSE score of 30 is intact, and there is no APOE4 genetic risk factor. The atrophy may be age-related rather than pathological.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium",
  "timestamp": "2025-07-26T17:30:03.339605"
}