{
  "ptid_time": "073_S_0312_2007-02-08",
  "img_path": "/data/qiuhui/data/adni/images/073_S_0312/2007-02-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 53,061 mm³, 12.9% above the reference mean. With a Z-score of 0.37 (64.6th percentile), this represents normal volume ; hippocampal volume measures 7,417 mm³, 6.4% above the reference mean. With a Z-score of 0.56 (71.1th percentile), this represents normal volume ; whole brain volume measures 1,050,950 mm³, 2.1% above the reference mean. With a Z-score of 0.28 (60.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,180 mm³, 5.3% above the reference mean. With a Z-score of 0.35 (63.6th percentile), this represents normal volume ; fusiform gyrus volume measures 17,862 mm³, 1.1% below the reference mean. With a Z-score of -0.10 (46.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,645 mm³, 7.3% above the reference mean. With a Z-score of 0.65 (74.4th percentile), this represents normal volume . ",
  "text_data": "Age is 83.3 years. Gender is Male. Education: 20 years. MMSE: 30.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges, with Z-scores close to or above the mean. The MMSE score of 30/30 indicates no cognitive impairment, and while APOE4 is a risk factor for Alzheimer's, it does not confirm disease presence without clinical or structural abnormalities.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T09:30:04.592621"
}