{
  "ptid_time": "023_S_4115_2020-01-13",
  "img_path": "/data/qiuhui/data/adni/images/023_S_4115/2020-01-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,042 mm³, 1.2% below the reference mean. With a Z-score of -0.03 (48.8th percentile), this represents normal volume ; hippocampal volume measures 8,683 mm³, 14.9% above the reference mean. With a Z-score of 1.45 (92.7th percentile), this represents mild enlargement; whole brain volume measures 1,105,900 mm³, 2.5% above the reference mean. With a Z-score of 0.32 (62.5th percentile), this represents normal volume ; entorhinal cortex volume measures 5,126 mm³, 25.0% above the reference mean. With a Z-score of 1.70 (95.5th percentile), this represents moderate enlargement; fusiform gyrus volume measures 20,237 mm³, 7.4% above the reference mean. With a Z-score of 0.63 (73.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,025 mm³, 7.9% above the reference mean. With a Z-score of 0.71 (76.1th percentile), this represents normal volume . ",
  "text_data": "Age is 75.9 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 25.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.07 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or above-average volumes in all regions, including the hippocampus and entorhinal cortex, which are typically affected in Alzheimer's. The MMSE score of 30 is perfect, and the MoCA score of 25 is within the normal range (≥26 is typical, but scores ≥25 are often considered normal in older adults). APOE4-negative status and normal AV45 (amyloid PET) further reduce Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T03:02:50.038518"
}