{
  "ptid_time": "031_S_4005_2012-04-12",
  "img_path": "/data/qiuhui/data/adni/images/031_S_4005/2012-04-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,083 mm³, 4.1% above the reference mean. With a Z-score of 0.10 (53.9th percentile), this represents normal volume ; hippocampal volume measures 7,096 mm³, 6.1% below the reference mean. With a Z-score of -0.60 (27.5th percentile), this represents normal volume ; whole brain volume measures 1,175,340 mm³, 8.9% above the reference mean. With a Z-score of 1.15 (87.6th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,232 mm³, 3.2% above the reference mean. With a Z-score of 0.22 (58.6th percentile), this represents normal volume ; fusiform gyrus volume measures 23,988 mm³, 27.3% above the reference mean. With a Z-score of 2.33 (99.0th percentile), this represents significant enlargement; middle temporal gyrus volume measures 22,817 mm³, 6.9% above the reference mean. With a Z-score of 0.62 (73.3th percentile), this represents normal volume . ",
  "text_data": "Age is 71.5 years. Gender is Male. Education: 16 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 4.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal or above-normal measurements across most regions, including the hippocampus, which is only slightly below the reference mean (Z-score -0.60, 27.5th percentile). Cognitive testing (MMSE 30, MoCA 28) is within normal limits, and there is no significant atrophy in key Alzheimer’s-related regions. The presence of one APOE4 allele increases risk but does not confirm pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to the slight hippocampal reduction and APOE4 status, but strong cognitive performance suggests no impairment)",
  "timestamp": "2025-07-26T04:43:33.886737"
}