{
  "ptid_time": "137_S_0972_2009-12-01",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0972/2009-12-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,332 mm³, 44.0% below the reference mean. With a Z-score of -1.28 (10.1th percentile), this represents mild atrophy; whole brain volume measures 931,833 mm³, 9.5% below the reference mean. With a Z-score of -1.24 (10.8th percentile), this represents mild atrophy. ",
  "text_data": "Age is 80.9 years. Gender is Male. Education: 16 years. MMSE: 29.0. Logical Memory: 18.0. APOEε4 alleles: 1.0. Biomarker levels: Pittsburgh compound B: 2.19 SUVR (moderate elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild atrophy in both ventricular and whole brain volumes, but the MMSE score of 29 is within the normal range (≥26), and there is no significant cognitive impairment reported. The presence of one APOE4 allele increases Alzheimer's risk but does not confirm pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to mild atrophy but normal cognitive scores)",
  "timestamp": "2025-07-26T16:20:43.883466"
}