{
  "ptid_time": "073_S_2225_2015-04-08",
  "img_path": "/data/qiuhui/data/adni/images/073_S_2225/2015-04-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,540 mm³, 20.7% below the reference mean. With a Z-score of -0.50 (31.0th percentile), this represents normal volume ; hippocampal volume measures 8,109 mm³, 7.3% above the reference mean. With a Z-score of 0.71 (76.1th percentile), this represents normal volume ; whole brain volume measures 1,154,100 mm³, 6.9% above the reference mean. With a Z-score of 0.90 (81.5th percentile), this represents normal volume . ",
  "text_data": "Age is 74.4 years. Gender is Male. Education: 20 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.34 SUVR (significant elevated). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements (ventricular, hippocampal, and whole brain) are all within normal ranges, with no significant atrophy. Cognitive scores (MMSE 30, MoCA 27) are also within normal limits, and there is no APOE4 risk allele. However, AV45 (amyloid PET) shows significant elevation, suggesting amyloid pathology.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to amyloid positivity despite normal cognition and brain structure)",
  "timestamp": "2025-07-26T09:39:21.868360"
}