{
  "ptid_time": "022_S_2379_2013-05-31",
  "img_path": "/data/qiuhui/data/adni/images/022_S_2379/2013-05-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,712 mm³, 24.4% below the reference mean. With a Z-score of -0.58 (28.1th percentile), this represents normal volume ; hippocampal volume measures 9,691 mm³, 20.7% above the reference mean. With a Z-score of 2.07 (98.1th percentile), this represents significant enlargement; whole brain volume measures 1,156,570 mm³, 1.9% above the reference mean. With a Z-score of 0.27 (60.8th percentile), this represents normal volume . ",
  "text_data": "Age is 68.0 years. Gender is Male. Education: 18 years. MMSE: 26.0. MoCA: 25.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.17 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is significantly enlarged (Z-score 2.07, 98.1th percentile), which is unusual for Alzheimer's disease (AD) as hippocampal atrophy is typical in AD. Ventricular and whole brain volumes are normal. Cognitive scores (MMSE 26, MoCA 25) are within normal limits, and amyloid PET (AV45) is normal, ruling out significant amyloid pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T02:16:19.297904"
}