{
  "ptid_time": "031_S_4032_2013-05-09",
  "img_path": "/data/qiuhui/data/adni/images/031_S_4032/2013-05-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,531 mm³, 44.7% below the reference mean. With a Z-score of -1.02 (15.3th percentile), this represents mild atrophy; hippocampal volume measures 7,025 mm³, 1.3% below the reference mean. With a Z-score of -0.12 (45.4th percentile), this represents normal volume ; whole brain volume measures 904,439 mm³, 7.2% below the reference mean. With a Z-score of -0.91 (18.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,140 mm³, 14.5% below the reference mean. With a Z-score of -0.89 (18.7th percentile), this represents normal volume ; fusiform gyrus volume measures 16,899 mm³, 0.7% below the reference mean. With a Z-score of -0.06 (47.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,477 mm³, 3.6% below the reference mean. With a Z-score of -0.31 (37.7th percentile), this represents normal volume . ",
  "text_data": "Age is 72.2 years. Gender is Female. Education: 14 years. MMSE: 28.0. MoCA: 30.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.05 SUVR (normal ); Amyloid beta: 1207.00 pg/mL (normal ); Total tau: 139.20 pg/mL (mild reduced); Phosphorylated tau: 11.80 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, etc.). Cognitive scores (MMSE 28, MoCA 30) are intact, and biomarkers (Aβ normal, tau mildly reduced) do not suggest Alzheimer’s pathology.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T04:46:07.841077"
}