{
  "ptid_time": "010_S_0422_2008-09-26",
  "img_path": "/data/qiuhui/data/adni/images/010_S_0422/2008-09-26/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,856 mm³, 30.5% below the reference mean. With a Z-score of -0.73 (23.4th percentile), this represents normal volume ; hippocampal volume measures 8,059 mm³, 0.4% above the reference mean. With a Z-score of 0.04 (51.6th percentile), this represents normal volume ; whole brain volume measures 1,173,750 mm³, 3.5% above the reference mean. With a Z-score of 0.49 (68.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,150 mm³, 2.6% below the reference mean. With a Z-score of -0.18 (42.7th percentile), this represents normal volume ; fusiform gyrus volume measures 20,337 mm³, 2.2% above the reference mean. With a Z-score of 0.18 (57.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,114 mm³, 1.3% below the reference mean. With a Z-score of -0.11 (45.6th percentile), this represents normal volume . ",
  "text_data": "Age is 63.6 years. Gender is Male. Education: 20 years. MMSE: 29.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. Biomarker levels: Pittsburgh compound B: 1.50 SUVR (normal ); Amyloid beta: 1630.00 pg/mL (moderate elevated); Total tau: 242.40 pg/mL (normal ); Phosphorylated tau: 21.29 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. The MMSE score of 29 is normal, and while Aβ is moderately 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 moderately elevated Aβ, but no other supporting biomarkers or cognitive deficits)",
  "timestamp": "2025-07-25T22:32:25.572910"
}