{
  "ptid_time": "127_S_6348_2020-10-07",
  "img_path": "/data/qiuhui/data/adni/images/127_S_6348/2020-10-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 9,789 mm³, 65.1% below the reference mean. With a Z-score of -1.49 (6.8th percentile), this represents mild atrophy; hippocampal volume measures 7,754 mm³, 9.0% above the reference mean. With a Z-score of 0.82 (79.5th percentile), this represents normal volume ; whole brain volume measures 985,119 mm³, 1.1% above the reference mean. With a Z-score of 0.14 (55.4th percentile), this represents normal volume ; entorhinal cortex volume measures 5,234 mm³, 42.5% above the reference mean. With a Z-score of 2.61 (99.5th percentile), this represents significant enlargement; fusiform gyrus volume measures 17,402 mm³, 2.3% above the reference mean. With a Z-score of 0.21 (58.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,136 mm³, 5.0% above the reference mean. With a Z-score of 0.44 (66.9th percentile), this represents normal volume . ",
  "text_data": "Age is 71.5 years. Gender is Female. Education: 18 years. MMSE: 29.0. MoCA: 28.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 0.95 SUVR (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild ventricular atrophy but otherwise normal or even enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 29, MoCA 28) are intact, and there is no APOE4 genetic risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T13:31:47.762893"
}