{
  "ptid_time": "041_S_4989_2014-11-11",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4989/2014-11-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,913 mm³, 33.2% below the reference mean. With a Z-score of -0.83 (20.3th percentile), this represents normal volume ; hippocampal volume measures 8,212 mm³, 6.9% above the reference mean. With a Z-score of 0.77 (77.9th percentile), this represents normal volume ; whole brain volume measures 1,107,650 mm³, 7.6% above the reference mean. With a Z-score of 0.95 (82.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,556 mm³, 8.7% below the reference mean. With a Z-score of -0.67 (25.1th percentile), this represents normal volume ; fusiform gyrus volume measures 18,655 mm³, 2.4% above the reference mean. With a Z-score of 0.28 (60.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 24,143 mm³, 17.7% above the reference mean. With a Z-score of 1.57 (94.2th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 62.1 years. Gender is Female. Education: 19 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.00 SUVR (normal ); Amyloid beta: 1363.00 pg/mL (normal ); Total tau: 135.10 pg/mL (mild reduced); Phosphorylated tau: 11.02 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus) are within normal ranges, with only the middle temporal gyrus showing moderate enlargement (likely not pathological). Cognitive scores (MMSE 30, MoCA 27) are normal, and biomarkers (Aβ normal, tau mildly reduced, APOE4 negative) do not suggest Alzheimer’s pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:23:12.701715"
}