{
  "ptid_time": "010_S_0422_2009-08-27",
  "img_path": "/data/qiuhui/data/adni/images/010_S_0422/2009-08-27/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,573 mm³, 31.5% below the reference mean. With a Z-score of -0.75 (22.7th percentile), this represents normal volume ; whole brain volume measures 1,146,580 mm³, 1.1% above the reference mean. With a Z-score of 0.15 (56.0th percentile), this represents normal volume . ",
  "text_data": "Age is 64.6 years. Gender is Male. Education: 20 years. MMSE: 28.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. Biomarker levels: Pittsburgh compound B: 1.51 SUVR (normal ); Amyloid beta: 1414.00 pg/mL (mild elevated); Total tau: 248.40 pg/mL (normal ); Phosphorylated tau: 21.30 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volumes (ventricular and whole brain) are within normal ranges, and the MMSE score of 28 is within the normal cognitive range. While Aβ is mildly elevated, tau biomarkers (T-tau and P-tau) are normal, suggesting no strong evidence of neurodegeneration.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mildly elevated Aβ, but no other supporting markers for MCI or dementia)",
  "timestamp": "2025-07-25T22:32:36.902606"
}