{
  "ptid_time": "057_S_0643_2008-07-16",
  "img_path": "/data/qiuhui/data/adni/images/057_S_0643/2008-07-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,200 mm³, 31.6% below the reference mean. With a Z-score of -0.72 (23.5th percentile), this represents normal volume ; whole brain volume measures 1,083,630 mm³, 11.2% above the reference mean. With a Z-score of 1.41 (92.0th percentile), this represents mild enlargement. ",
  "text_data": "Age is 73.4 years. Gender is Female. Education: 15 years. MMSE: 30.0. Logical Memory: 15.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is within normal limits (Z-score -0.72), and whole brain volume is mildly enlarged (Z-score 1.41), suggesting no significant atrophy. Cognitive testing (MMSE 30/30) is intact, and while APOE4 homozygosity increases Alzheimer's risk, there are currently no clinical or structural signs of impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to APOE4 risk but no current deficits)",
  "timestamp": "2025-07-26T08:04:09.665303"
}