{
  "ptid_time": "041_S_4427_2012-06-25",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4427/2012-06-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 47,910 mm³, 24.4% above the reference mean. With a Z-score of 0.58 (72.0th percentile), this represents normal volume ; whole brain volume measures 1,242,260 mm³, 15.1% above the reference mean. With a Z-score of 1.96 (97.5th percentile), this represents moderate enlargement; entorhinal cortex volume measures 3,581 mm³, 12.7% below the reference mean. With a Z-score of -0.86 (19.5th percentile), this represents normal volume ; fusiform gyrus volume measures 21,737 mm³, 15.4% above the reference mean. With a Z-score of 1.31 (90.5th percentile), this represents mild enlargement; middle temporal gyrus volume measures 21,680 mm³, 1.6% above the reference mean. With a Z-score of 0.14 (55.7th percentile), this represents normal volume . ",
  "text_data": "Age is 71.8 years. Gender is Male. Education: 12 years. MMSE: 29.0. MoCA: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows normal to enlarged volumes in most regions, with only the entorhinal cortex slightly below the reference mean (Z-score -0.86, still within normal range). Cognitive scores (MMSE 29, MoCA 26) are within normal limits for age, and there is no APOE4 genetic risk factor. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:16:37.117384"
}