{
  "ptid_time": "024_S_0985_2008-10-30",
  "img_path": "/data/qiuhui/data/adni/images/024_S_0985/2008-10-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 43,956 mm³, 6.5% below the reference mean. With a Z-score of -0.19 (42.5th percentile), this represents normal volume ; whole brain volume measures 821,094 mm³, 20.2% below the reference mean. With a Z-score of -2.65 (0.4th percentile), this represents significant atrophy. ",
  "text_data": "Age is 83.6 years. Gender is Male. Education: 14 years. MMSE: 29.0. Logical Memory: 5.0. APOEε4 alleles: 1.0. Biomarker levels: Pittsburgh compound B: 2.00 SUVR (mild elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The whole brain volume shows significant atrophy (Z-score -2.65, 0.4th percentile), which is concerning for neurodegenerative disease. However, the MMSE score of 29 is within the normal range, suggesting preserved cognitive function despite structural changes.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium  \n\n(While the brain atrophy is severe, the lack of cognitive impairment on MMSE makes dementia unlikely. MCI is also less likely given the high MMSE. However, the discrepancy between imaging and clinical findings warrants medium confidence.)",
  "timestamp": "2025-07-26T03:12:02.427136"
}