{
  "ptid_time": "127_S_0112_2008-01-29",
  "img_path": "/data/qiuhui/data/adni/images/127_S_0112/2008-01-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 49,892 mm³, 29.5% above the reference mean. With a Z-score of 0.71 (76.0th percentile), this represents normal volume ; hippocampal volume measures 8,003 mm³, 5.9% above the reference mean. With a Z-score of 0.57 (71.7th percentile), this represents normal volume ; whole brain volume measures 1,134,480 mm³, 5.1% above the reference mean. With a Z-score of 0.66 (74.6th percentile), this represents normal volume ; entorhinal cortex volume measures 5,125 mm³, 25.0% above the reference mean. With a Z-score of 1.69 (95.5th percentile), this represents moderate enlargement; fusiform gyrus volume measures 20,799 mm³, 10.4% above the reference mean. With a Z-score of 0.89 (81.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,999 mm³, 12.5% above the reference mean. With a Z-score of 1.12 (86.9th percentile), this represents mild enlargement. ",
  "text_data": "Age is 72.6 years. Gender is Male. Education: 18 years. MMSE: 29.0. Logical Memory: 11.0. APOEε4 alleles: 1.0. Biomarker levels: Pittsburgh compound B: 2.07 SUVR (mild elevated); Amyloid beta: 394.80 pg/mL (moderate reduced); Total tau: 262.70 pg/mL (normal ); Phosphorylated tau: 26.91 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volumes (hippocampal, whole brain, fusiform gyrus) are within normal ranges or mildly enlarged, with no significant atrophy. The MMSE score of 29 is within the normal range, and while Aβ is moderately reduced (suggesting amyloid pathology), T-tau and P-tau are normal, indicating no significant neurodegeneration.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to moderately reduced Aβ, but no clinical or structural evidence of impairment)",
  "timestamp": "2025-07-26T12:55:02.320731"
}