{
  "ptid_time": "126_S_0784_2007-10-09",
  "img_path": "/data/qiuhui/data/adni/images/126_S_0784/2007-10-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,801 mm³, 8.1% below the reference mean. With a Z-score of -0.18 (42.7th percentile), this represents normal volume ; whole brain volume measures 889,017 mm³, 8.8% below the reference mean. With a Z-score of -1.11 (13.4th percentile), this represents mild atrophy. ",
  "text_data": "Age is 76.8 years. Gender is Female. Education: 16 years. MMSE: 28.0. Logical Memory: 1.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "Reasoning: The patient shows mild whole brain atrophy (Z-score -1.11, 13.4th percentile) but normal ventricular volume. Cognitive performance (MMSE 28) is intact, and there is no genetic risk (APOE4 negative). Mild atrophy without cognitive impairment suggests normal aging rather than pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (mild atrophy could warrant monitoring, but no functional or cognitive deficits support CN)",
  "timestamp": "2025-07-26T12:40:19.285260"
}