{
  "ptid_time": "033_S_0923_2007-04-20",
  "img_path": "/data/qiuhui/data/adni/images/033_S_0923/2007-04-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,709 mm³, 19.8% below the reference mean. With a Z-score of -0.57 (28.3th percentile), this represents normal volume ; hippocampal volume measures 8,847 mm³, 27.0% above the reference mean. With a Z-score of 2.33 (99.0th percentile), this represents significant enlargement; whole brain volume measures 1,035,310 mm³, 0.6% above the reference mean. With a Z-score of 0.08 (53.1th percentile), this represents normal volume ; entorhinal cortex volume measures 4,823 mm³, 21.5% above the reference mean. With a Z-score of 1.41 (92.1th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,006 mm³, 5.9% below the reference mean. With a Z-score of -0.51 (30.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,669 mm³, 12.4% above the reference mean. With a Z-score of 1.11 (86.6th percentile), this represents mild enlargement. ",
  "text_data": "Age is 83.6 years. Gender is Male. Education: 14 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain volume data shows normal or above-average measurements in most regions, including significant hippocampal enlargement (99th percentile) and mild entorhinal cortex enlargement (92.1st percentile). The MMSE score of 30/30 is intact, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T05:24:57.014180"
}