{
  "ptid_time": "941_S_4292_2013-09-23",
  "img_path": "/data/qiuhui/data/adni/images/941_S_4292/2013-09-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,501 mm³, 33.8% below the reference mean. With a Z-score of -0.81 (20.9th percentile), this represents normal volume ; hippocampal volume measures 7,685 mm³, 1.7% above the reference mean. With a Z-score of 0.16 (56.5th percentile), this represents normal volume ; whole brain volume measures 1,035,470 mm³, 4.1% below the reference mean. With a Z-score of -0.53 (29.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,166 mm³, 1.6% above the reference mean. With a Z-score of 0.11 (54.3th percentile), this represents normal volume ; fusiform gyrus volume measures 16,901 mm³, 10.3% below the reference mean. With a Z-score of -0.88 (19.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,145 mm³, 5.6% below the reference mean. With a Z-score of -0.50 (30.7th percentile), this represents normal volume . ",
  "text_data": "Age is 72.9 years. Gender is Male. Education: 15 years. MMSE: 28.0. MoCA: 24.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.04 SUVR (normal ); Total tau: 252.50 pg/mL (normal ); Phosphorylated tau: 21.27 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampus, entorhinal cortex, fusiform gyrus, etc.) are within normal ranges (Z-scores between -0.88 and +0.16). Cognitive scores (MMSE 28, MoCA 24) are borderline for MCI but not dementia, and biomarkers (T-tau, P-tau, AV45) are normal. APOE4-negative status further reduces Alzheimer’s risk.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (MoCA 24 is slightly low for age, but structural and biomarker data strongly support normal cognition)",
  "timestamp": "2025-07-26T17:37:42.334586"
}