{
  "ptid_time": "035_S_4082_2013-06-17",
  "img_path": "/data/qiuhui/data/adni/images/035_S_4082/2013-06-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 63,166 mm³, 64.0% above the reference mean. With a Z-score of 1.53 (93.7th percentile), this represents moderate enlargement; hippocampal volume measures 8,003 mm³, 5.9% above the reference mean. With a Z-score of 0.57 (71.7th percentile), this represents normal volume ; whole brain volume measures 1,261,030 mm³, 16.8% above the reference mean. With a Z-score of 2.18 (98.6th percentile), this represents significant enlargement; entorhinal cortex volume measures 4,911 mm³, 19.8% above the reference mean. With a Z-score of 1.34 (91.0th percentile), this represents mild enlargement; fusiform gyrus volume measures 21,301 mm³, 13.1% above the reference mean. With a Z-score of 1.11 (86.7th percentile), this represents mild enlargement; middle temporal gyrus volume measures 23,106 mm³, 8.3% above the reference mean. With a Z-score of 0.74 (77.2th percentile), this represents normal volume . ",
  "text_data": "Age is 77.4 years. Gender is Male. Education: 17 years. MMSE: 26.0. MoCA: 29.0. Logical Memory: 16.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 0.96 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows moderate ventricular enlargement (consistent with age-related atrophy) but otherwise normal-to-above-average volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus). Cognitive scores (MMSE 26, MoCA 29) are within normal limits for age, and amyloid PET (AV45) is normal. APOE4 carrier status increases Alzheimer’s risk but is not diagnostic.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **High** (No structural or biomarker evidence of neurodegeneration or cognitive impairment.)",
  "timestamp": "2025-07-26T05:54:31.701433"
}