{
  "ptid_time": "136_S_0086_2006-10-30",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0086/2006-10-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 39,936 mm³, 8.0% above the reference mean. With a Z-score of 0.22 (58.6th percentile), this represents normal volume ; hippocampal volume measures 5,713 mm³, 12.0% below the reference mean. With a Z-score of -0.96 (16.7th percentile), this represents normal volume ; whole brain volume measures 949,412 mm³, 2.3% above the reference mean. With a Z-score of 0.27 (60.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,228 mm³, 22.1% above the reference mean. With a Z-score of 1.19 (88.4th percentile), this represents mild enlargement; fusiform gyrus volume measures 15,499 mm³, 3.8% below the reference mean. With a Z-score of -0.28 (38.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,320 mm³, 1.6% above the reference mean. With a Z-score of 0.14 (55.7th percentile), this represents normal volume . ",
  "text_data": "Age is 80.8 years. Gender is Female. Education: 18 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is 12% below the reference mean (Z-score -0.96, 16.7th percentile), which may indicate early atrophy, but all other brain volumes are within normal ranges or even enlarged (entorhinal cortex). The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Hippocampal volume is slightly reduced, but no other significant structural or cognitive deficits are present.)",
  "timestamp": "2025-07-26T15:54:41.749389"
}