{
  "ptid_time": "006_S_0484_2006-09-13",
  "img_path": "/data/qiuhui/data/adni/images/006_S_0484/2006-09-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,136 mm³, 42.5% below the reference mean. With a Z-score of -1.02 (15.4th percentile), this represents mild atrophy; hippocampal volume measures 8,481 mm³, 12.2% above the reference mean. With a Z-score of 1.19 (88.3th percentile), this represents mild enlargement; whole brain volume measures 1,220,240 mm³, 13.0% above the reference mean. With a Z-score of 1.69 (95.5th percentile), this represents moderate enlargement; entorhinal cortex volume measures 4,440 mm³, 8.3% above the reference mean. With a Z-score of 0.56 (71.3th percentile), this represents normal volume ; fusiform gyrus volume measures 21,353 mm³, 13.3% above the reference mean. With a Z-score of 1.14 (87.2th percentile), this represents mild enlargement; middle temporal gyrus volume measures 27,170 mm³, 27.3% above the reference mean. With a Z-score of 2.46 (99.3th percentile), this represents significant enlargement. ",
  "text_data": "Age is 70.7 years. Gender is Male. Education: 18 years. MMSE: 29.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 1342.00 pg/mL (normal ); Total tau: 147.90 pg/mL (mild reduced); Phosphorylated tau: 13.18 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain volume data shows mild ventricular atrophy but otherwise normal-to-enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). The MMSE score of 29 is within normal limits, and biomarkers (Aβ normal, tau reduced) do not suggest Alzheimer's pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-25T21:25:50.760096"
}