{
  "ptid_time": "094_S_6250_2018-03-29",
  "img_path": "/data/qiuhui/data/adni/images/094_S_6250/2018-03-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,355 mm³, 31.0% below the reference mean. With a Z-score of -0.71 (23.9th percentile), this represents normal volume ; hippocampal volume measures 6,989 mm³, 1.8% below the reference mean. With a Z-score of -0.16 (43.6th percentile), this represents normal volume ; whole brain volume measures 947,338 mm³, 2.8% below the reference mean. With a Z-score of -0.35 (36.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,567 mm³, 2.9% below the reference mean. With a Z-score of -0.18 (43.0th percentile), this represents normal volume ; fusiform gyrus volume measures 16,979 mm³, 0.2% below the reference mean. With a Z-score of -0.02 (49.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,001 mm³, 11.3% below the reference mean. With a Z-score of -0.98 (16.3th percentile), this represents normal volume . ",
  "text_data": "Age is 71.9 years. Gender is Female. Education: 16 years. Handedness: Right. Race: White. MMSE: 30.0. MoCA: 26.0. Logical Memory: 13.0. APOEε4 alleles: 1.0. Biomarker levels: Flobetaben (FBB): 1.50 SUVR (profound elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive screening scores (MMSE 30, MoCA 26) are within normal limits for age, though the MoCA is slightly lower than the MMSE, which may suggest mild attentional or executive challenges but not dementia. APOE4 carrier status increases Alzheimer’s risk but does not confirm pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to slightly reduced MoCA score, but no structural or significant cognitive deficits)",
  "timestamp": "2025-07-26T10:34:56.848627"
}