{
  "ptid_time": "073_S_2191_2011-01-07",
  "img_path": "/data/qiuhui/data/adni/images/073_S_2191/2011-01-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 17,897 mm³, 19.9% below the reference mean. With a Z-score of -0.50 (30.9th percentile), this represents normal volume ; hippocampal volume measures 7,962 mm³, 3.6% above the reference mean. With a Z-score of 0.41 (65.7th percentile), this represents normal volume ; whole brain volume measures 1,172,280 mm³, 13.9% above the reference mean. With a Z-score of 1.73 (95.8th percentile), this represents moderate enlargement; entorhinal cortex volume measures 4,620 mm³, 18.7% above the reference mean. With a Z-score of 1.45 (92.6th percentile), this represents mild enlargement; fusiform gyrus volume measures 22,679 mm³, 24.5% above the reference mean. With a Z-score of 2.76 (99.7th percentile), this represents significant enlargement; middle temporal gyrus volume measures 22,502 mm³, 9.7% above the reference mean. With a Z-score of 0.86 (80.5th percentile), this represents normal volume . ",
  "text_data": "Age is 66.7 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.05 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal to enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, and middle temporal gyrus), with no atrophy suggestive of Alzheimer's. Cognitive scores (MMSE 30, MoCA 29) are intact, and amyloid PET (AV45) is normal. APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T09:37:36.474658"
}