{
  "ptid_time": "073_S_0746_2008-02-11",
  "img_path": "/data/qiuhui/data/adni/images/073_S_0746/2008-02-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,970 mm³, 6.8% above the reference mean. With a Z-score of 0.16 (56.2th percentile), this represents normal volume ; hippocampal volume measures 7,051 mm³, 0.9% below the reference mean. With a Z-score of -0.08 (46.7th percentile), this represents normal volume ; whole brain volume measures 993,989 mm³, 2.0% above the reference mean. With a Z-score of 0.25 (59.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,620 mm³, 1.4% below the reference mean. With a Z-score of -0.09 (46.5th percentile), this represents normal volume ; fusiform gyrus volume measures 17,616 mm³, 3.5% above the reference mean. With a Z-score of 0.32 (62.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,781 mm³, 2.0% below the reference mean. With a Z-score of -0.18 (43.0th percentile), this represents normal volume . ",
  "text_data": "Age is 74.8 years. Gender is Female. Education: 18 years. MMSE: 30.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 1540.00 pg/mL (mild elevated); Total tau: 240.60 pg/mL (normal ); Phosphorylated tau: 20.97 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. The MMSE score of 30 is intact, and while Aβ is mildly elevated, tau markers (T-tau, P-tau) are normal, suggesting no strong evidence of neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T09:34:08.395340"
}