{
  "ptid_time": "014_S_0519_2007-05-23",
  "img_path": "/data/qiuhui/data/adni/images/014_S_0519/2007-05-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,411 mm³, 17.9% above the reference mean. With a Z-score of 0.43 (66.6th percentile), this represents normal volume ; hippocampal volume measures 7,889 mm³, 4.4% above the reference mean. With a Z-score of 0.43 (66.5th percentile), this represents normal volume ; whole brain volume measures 1,034,000 mm³, 4.2% below the reference mean. With a Z-score of -0.55 (29.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,597 mm³, 12.1% above the reference mean. With a Z-score of 0.82 (79.4th percentile), this represents normal volume ; fusiform gyrus volume measures 18,949 mm³, 0.6% above the reference mean. With a Z-score of 0.05 (52.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,579 mm³, 10.5% above the reference mean. With a Z-score of 0.94 (82.7th percentile), this represents normal volume . ",
  "text_data": "Age is 75.1 years. Gender is Male. Education: 16 years. MMSE: 28.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 1443.00 pg/mL (mild elevated); Total tau: 189.10 pg/mL (normal ); Phosphorylated tau: 15.41 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, ventricular, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. The MMSE score of 28 is within the normal range (≥26), and while Aβ is mildly elevated, T-tau and P-tau are normal, suggesting no strong biomarker evidence of Alzheimer’s pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mildly elevated Aβ, but no other supporting biomarkers or cognitive deficits)",
  "timestamp": "2025-07-25T23:40:30.940932"
}