{
  "ptid_time": "137_S_0459_2006-11-14",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0459/2006-11-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 36,611 mm³, 4.9% below the reference mean. With a Z-score of -0.12 (45.3th percentile), this represents normal volume ; whole brain volume measures 970,483 mm³, 10.1% below the reference mean. With a Z-score of -1.31 (9.5th percentile), this represents mild atrophy. ",
  "text_data": "Age is 73.4 years. Gender is Male. Education: 16 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The ventricular volume is within normal limits, but the whole brain volume shows mild atrophy (Z-score -1.31, 9.5th percentile). However, cognitive performance (MMSE 29/30) is intact, and there is no APOE4 genetic risk factor.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (mild atrophy is present but not accompanied by cognitive decline or genetic risk)",
  "timestamp": "2025-07-26T16:10:45.839176"
}