{
  "ptid_time": "032_S_0718_2008-09-22",
  "img_path": "/data/qiuhui/data/adni/images/032_S_0718/2008-09-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 47,349 mm³, 28.1% above the reference mean. With a Z-score of 0.76 (77.6th percentile), this represents normal volume ; hippocampal volume measures 6,823 mm³, 5.0% above the reference mean. With a Z-score of 0.40 (65.7th percentile), this represents normal volume ; whole brain volume measures 968,826 mm³, 4.4% above the reference mean. With a Z-score of 0.53 (70.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,857 mm³, 11.4% above the reference mean. With a Z-score of 0.61 (73.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,052 mm³, 5.8% above the reference mean. With a Z-score of 0.44 (67.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,733 mm³, 7.2% below the reference mean. With a Z-score of -0.64 (26.1th percentile), this represents normal volume . ",
  "text_data": "Age is 82.4 years. Gender is Female. Education: 18 years. MMSE: 28.0. Logical Memory: 6.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 903.80 pg/mL (normal ); Total tau: 405.00 pg/mL (significant elevated); Phosphorylated tau: 41.94 pg/mL (significant elevated). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, 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 Aβ levels are normal. However, T-tau and P-tau are significantly elevated, which may indicate neurodegeneration despite preserved cognitive function.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Elevated tau biomarkers suggest possible early neurodegenerative changes, but structural and cognitive measures remain intact.)",
  "timestamp": "2025-07-26T04:58:07.095555"
}