{
  "ptid_time": "012_S_1009_2007-05-30",
  "img_path": "/data/qiuhui/data/adni/images/012_S_1009/2007-05-30/t1.nii.gz",
  "img_finding": "Image findings: hippocampal volume measures 7,098 mm³, 6.1% below the reference mean. With a Z-score of -0.60 (27.6th percentile), this represents normal volume ; whole brain volume measures 1,074,200 mm³, 0.5% below the reference mean. With a Z-score of -0.06 (47.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,866 mm³, 5.7% below the reference mean. With a Z-score of -0.39 (34.9th percentile), this represents normal volume ; fusiform gyrus volume measures 19,120 mm³, 1.5% above the reference mean. With a Z-score of 0.13 (55.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,271 mm³, 0.3% below the reference mean. With a Z-score of -0.03 (48.9th percentile), this represents normal volume . ",
  "text_data": "Age is 76.3 years. Gender is Male. Education: 16 years. MMSE: 25.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus volumes are all within normal ranges (Z-scores close to 0, percentiles near 50th). The MMSE score of 25 is slightly below normal (typically <24 suggests impairment), but given the normal brain volumes and lack of significant atrophy, this likely does not indicate dementia. The presence of two APOE4 alleles increases Alzheimer's risk but does not confirm pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (MMSE is borderline, but structural imaging is reassuringly normal)",
  "timestamp": "2025-07-25T23:07:40.171917"
}