{
  "ptid_time": "041_S_1418_2009-02-23",
  "img_path": "/data/qiuhui/data/adni/images/041_S_1418/2009-02-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,464 mm³, 20.3% below the reference mean. With a Z-score of -0.59 (27.8th percentile), this represents normal volume ; hippocampal volume measures 6,577 mm³, 5.6% below the reference mean. With a Z-score of -0.49 (31.4th percentile), this represents normal volume ; whole brain volume measures 998,491 mm³, 3.0% below the reference mean. With a Z-score of -0.39 (34.8th percentile), this represents normal volume ; entorhinal cortex volume measures 2,811 mm³, 29.2% below the reference mean. With a Z-score of -1.91 (2.8th percentile), this represents moderate atrophy; fusiform gyrus volume measures 17,979 mm³, 0.5% below the reference mean. With a Z-score of -0.04 (48.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,775 mm³, 11.9% below the reference mean. With a Z-score of -1.07 (14.3th percentile), this represents mild atrophy. ",
  "text_data": "Age is 83.0 years. Gender is Male. Education: 12 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The entorhinal cortex shows moderate atrophy (Z-score -1.91, 2.8th percentile), and the middle temporal gyrus shows mild atrophy (Z-score -1.07, 14.3th percentile), which are early markers of Alzheimer's pathology. However, hippocampal and whole brain volumes are within normal limits, and the MMSE score of 28 is intact.  \nDiagnosis: **MCI** (due to focal atrophy in Alzheimer’s-vulnerable regions but preserved global cognition).  \nConfidence: **Medium** (atrophy patterns suggest early neurodegeneration, but high MMSE and lack of APOE4 reduce certainty).",
  "timestamp": "2025-07-26T07:06:12.574479"
}