{
  "ptid_time": "041_S_5082_2015-03-03",
  "img_path": "/data/qiuhui/data/adni/images/041_S_5082/2015-03-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 34,874 mm³, 9.5% below the reference mean. With a Z-score of -0.23 (41.0th percentile), this represents normal volume ; hippocampal volume measures 7,531 mm³, 0.4% below the reference mean. With a Z-score of -0.04 (48.6th percentile), this represents normal volume ; whole brain volume measures 1,048,830 mm³, 2.8% below the reference mean. With a Z-score of -0.37 (35.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,042 mm³, 1.4% below the reference mean. With a Z-score of -0.10 (46.1th percentile), this represents normal volume ; fusiform gyrus volume measures 19,973 mm³, 6.0% above the reference mean. With a Z-score of 0.51 (69.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 25,797 mm³, 20.9% above the reference mean. With a Z-score of 1.88 (97.0th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 71.2 years. Gender is Male. Education: 16 years. MMSE: 30.0. MoCA: 25.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.02 SUVR (normal ); Amyloid beta: 1595.00 pg/mL (mild elevated); Total tau: 185.50 pg/mL (normal ); Phosphorylated tau: 15.60 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus) are within normal ranges except for the middle temporal gyrus, which shows moderate enlargement. Cognitive scores (MMSE 30, MoCA 25) are within normal limits, and biomarkers (Aβ mildly elevated but T-tau/P-tau normal, AV45 normal) do not strongly suggest Alzheimer’s pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild Aβ elevation, but no significant structural or cognitive impairment)",
  "timestamp": "2025-07-26T07:24:51.742548"
}