{
  "ptid_time": "168_S_6065_2017-09-05",
  "img_path": "/data/qiuhui/data/adni/images/168_S_6065/2017-09-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 12,858 mm³, 54.2% below the reference mean. With a Z-score of -1.24 (10.7th percentile), this represents mild atrophy; hippocampal volume measures 8,149 mm³, 14.5% above the reference mean. With a Z-score of 1.33 (90.9th percentile), this represents mild enlargement; whole brain volume measures 1,000,920 mm³, 2.7% above the reference mean. With a Z-score of 0.34 (63.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,041 mm³, 10.0% above the reference mean. With a Z-score of 0.62 (73.1th percentile), this represents normal volume ; fusiform gyrus volume measures 16,896 mm³, 0.7% below the reference mean. With a Z-score of -0.06 (47.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,147 mm³, 5.1% above the reference mean. With a Z-score of 0.44 (67.1th percentile), this represents normal volume . ",
  "text_data": "Age is 71.2 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 16.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.32 SUVR (moderate elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild ventricular atrophy but otherwise normal or above-average volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive testing (MMSE 30, MoCA 30) is intact, and while APOE4 carrier status and moderate AV45 (amyloid) elevation suggest some risk, there is no current cognitive impairment.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to conflicting biomarkers—amyloid elevation vs. preserved structure/function)",
  "timestamp": "2025-07-26T17:17:38.858619"
}