{
  "ptid_time": "016_S_1326_2008-10-06",
  "img_path": "/data/qiuhui/data/adni/images/016_S_1326/2008-10-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 57,078 mm³, 90.1% above the reference mean. With a Z-score of 2.14 (98.4th percentile), this represents significant enlargement; whole brain volume measures 1,136,880 mm³, 0.2% above the reference mean. With a Z-score of 0.03 (51.2th percentile), this represents normal volume . ",
  "text_data": "Age is 67.8 years. Gender is Male. Education: 18 years. MMSE: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "Reasoning: The ventricular volume is significantly enlarged (90.1% above reference mean, Z-score 2.14), which is often associated with brain atrophy, while whole brain volume remains normal. The MMSE score of 28 is within the normal range, and the presence of one APOE4 allele increases Alzheimer's risk but does not confirm impairment.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (ventricular enlargement suggests possible early neurodegeneration, but cognitive performance is intact)",
  "timestamp": "2025-07-26T00:18:51.527496"
}