{
  "ptid_time": "941_S_1203_2009-02-25",
  "img_path": "/data/qiuhui/data/adni/images/941_S_1203/2009-02-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 36,841 mm³, 21.6% below the reference mean. With a Z-score of -0.63 (26.5th percentile), this represents normal volume ; whole brain volume measures 875,248 mm³, 15.0% below the reference mean. With a Z-score of -1.96 (2.5th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 85.3 years. Gender is Male. Education: 15 years. MMSE: 30.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 1221.00 pg/mL (normal ); Total tau: 216.60 pg/mL (normal ); Phosphorylated tau: 16.65 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The patient shows moderate whole brain atrophy (Z-score -1.96, 2.5th percentile) but normal ventricular volume. Biomarkers (Aβ, T-tau, P-tau) are normal, and cognitive performance (MMSE 30) is intact. The atrophy may reflect aging rather than pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium",
  "timestamp": "2025-07-26T17:30:11.111348"
}