{
  "ptid_time": "126_S_1187_2007-08-13",
  "img_path": "/data/qiuhui/data/adni/images/126_S_1187/2007-08-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,008 mm³, 16.9% above the reference mean. With a Z-score of 0.40 (65.7th percentile), this represents normal volume ; hippocampal volume measures 7,009 mm³, 7.3% below the reference mean. With a Z-score of -0.71 (23.9th percentile), this represents normal volume ; whole brain volume measures 1,129,310 mm³, 4.6% above the reference mean. With a Z-score of 0.60 (72.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,482 mm³, 9.3% above the reference mean. With a Z-score of 0.63 (73.6th percentile), this represents normal volume ; fusiform gyrus volume measures 18,707 mm³, 0.7% below the reference mean. With a Z-score of -0.06 (47.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,069 mm³, 3.4% above the reference mean. With a Z-score of 0.31 (62.1th percentile), this represents normal volume . ",
  "text_data": "Age is 76.9 years. Gender is Male. Education: 12 years. MMSE: 26.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The brain volumes (hippocampus, entorhinal cortex, fusiform gyrus, etc.) are within normal ranges, with only mild deviations from the reference mean. The MMSE score of 26 is slightly below the typical cutoff of 27-30 for normal cognition but does not strongly indicate dementia. The presence of one APOE4 allele increases Alzheimer's risk but is not diagnostic.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to borderline MMSE and APOE4 status, but normal imaging)",
  "timestamp": "2025-07-26T12:42:27.981546"
}