{
  "ptid_time": "020_S_6227_2020-09-01",
  "img_path": "/data/qiuhui/data/adni/images/020_S_6227/2020-09-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,686 mm³, 34.3% below the reference mean. With a Z-score of -0.86 (19.6th percentile), this represents normal volume ; hippocampal volume measures 8,624 mm³, 12.2% above the reference mean. With a Z-score of 1.37 (91.5th percentile), this represents mild enlargement; whole brain volume measures 1,121,360 mm³, 9.0% above the reference mean. With a Z-score of 1.12 (86.8th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,072 mm³, 4.6% above the reference mean. With a Z-score of 0.36 (63.9th percentile), this represents normal volume ; fusiform gyrus volume measures 21,004 mm³, 15.3% above the reference mean. With a Z-score of 1.73 (95.8th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 23,721 mm³, 15.6% above the reference mean. With a Z-score of 1.39 (91.7th percentile), this represents mild enlargement. ",
  "text_data": "Age is 64.5 years. Gender is Female. Education: 18 years. MMSE: 29.0. MoCA: 28.0. Logical Memory: 20.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 1.09 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain volume measurements show normal or above-average volumes in all regions, including the hippocampus and entorhinal cortex, which are typically affected in Alzheimer's. Cognitive scores (MMSE 29, MoCA 28) are within normal range, and the absence of APOE4 further reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T01:18:09.155674"
}