{
  "ptid_time": "126_S_0708_2008-01-31",
  "img_path": "/data/qiuhui/data/adni/images/126_S_0708/2008-01-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,384 mm³, 7.4% above the reference mean. With a Z-score of 0.18 (57.1th percentile), this represents normal volume ; hippocampal volume measures 6,850 mm³, 9.4% below the reference mean. With a Z-score of -0.92 (18.0th percentile), this represents normal volume ; whole brain volume measures 1,159,870 mm³, 7.5% above the reference mean. With a Z-score of 0.97 (83.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,248 mm³, 3.6% above the reference mean. With a Z-score of 0.24 (59.6th percentile), this represents normal volume ; fusiform gyrus volume measures 21,013 mm³, 11.5% above the reference mean. With a Z-score of 0.98 (83.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,847 mm³, 11.7% below the reference mean. With a Z-score of -1.05 (14.7th percentile), this represents mild atrophy. ",
  "text_data": "Age is 77.9 years. Gender is Male. Education: 16 years. MMSE: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is slightly below the reference mean (Z-score -0.92, 18th percentile), but still within the normal range. The middle temporal gyrus shows mild atrophy (Z-score -1.05, 14.7th percentile), but other key regions (whole brain, entorhinal cortex, fusiform gyrus) are normal or above average. The MMSE score of 28 is within the normal range, and there is no significant global atrophy.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild temporal atrophy may warrant monitoring, but no strong evidence of MCI or dementia)",
  "timestamp": "2025-07-26T12:38:43.332533"
}