{
  "ptid_time": "021_S_0337_2009-04-28",
  "img_path": "/data/qiuhui/data/adni/images/021_S_0337/2009-04-28/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 107,115 mm³, 178.1% above the reference mean. With a Z-score of 4.27 (100.0th percentile), this represents profound enlargement; whole brain volume measures 1,006,450 mm³, 6.8% below the reference mean. With a Z-score of -0.88 (19.0th percentile), this represents normal volume . ",
  "text_data": "Age is 78.8 years. Gender is Male. Education: 20 years. MMSE: 29.0. Logical Memory: 19.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The ventricular volume is significantly enlarged (178.1% above reference mean, Z-score 4.27), which is a strong indicator of neurodegeneration, while whole brain volume is within normal limits. Despite the structural changes, cognitive function (MMSE 29/30) remains intact, suggesting no significant clinical impairment.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (High structural abnormality but preserved cognition; APOE4 carrier status increases future risk but does not affect current diagnosis).",
  "timestamp": "2025-07-26T01:29:31.702715"
}