{
  "ptid_time": "168_S_6085_2020-03-19",
  "img_path": "/data/qiuhui/data/adni/images/168_S_6085/2020-03-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,698 mm³, 21.9% above the reference mean. With a Z-score of 0.63 (73.4th percentile), this represents normal volume ; hippocampal volume measures 9,583 mm³, 22.7% above the reference mean. With a Z-score of 3.16 (99.9th percentile), this represents profound enlargement; whole brain volume measures 1,147,690 mm³, 10.3% above the reference mean. With a Z-score of 1.23 (89.2th percentile), this represents mild enlargement; entorhinal cortex volume measures 3,852 mm³, 4.2% above the reference mean. With a Z-score of 0.33 (63.0th percentile), this represents normal volume ; fusiform gyrus volume measures 20,708 mm³, 12.4% above the reference mean. With a Z-score of 1.12 (86.9th percentile), this represents mild enlargement; middle temporal gyrus volume measures 22,052 mm³, 7.4% above the reference mean. With a Z-score of 0.61 (72.9th percentile), this represents normal volume . ",
  "text_data": "Age is 57.8 years. Gender is Female. Education: 16 years. MMSE: 28.0. MoCA: 26.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows no significant atrophy in key regions typically affected in Alzheimer's disease (e.g., hippocampus is profoundly enlarged, not reduced). Cognitive scores (MMSE 28, MoCA 26) are within normal ranges, and the absence of APOE4 further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T17:17:52.612562"
}