{
  "ptid_time": "126_S_0709_2009-08-17",
  "img_path": "/data/qiuhui/data/adni/images/126_S_0709/2009-08-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 61,578 mm³, 31.0% above the reference mean. With a Z-score of 0.90 (81.6th percentile), this represents normal volume ; hippocampal volume measures 7,181 mm³, 3.1% above the reference mean. With a Z-score of 0.26 (60.4th percentile), this represents normal volume ; whole brain volume measures 1,023,300 mm³, 0.6% below the reference mean. With a Z-score of -0.07 (47.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,690 mm³, 7.0% below the reference mean. With a Z-score of -0.46 (32.3th percentile), this represents normal volume ; fusiform gyrus volume measures 16,045 mm³, 11.2% below the reference mean. With a Z-score of -0.97 (16.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,575 mm³, 17.8% below the reference mean. With a Z-score of -1.60 (5.5th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 86.8 years. Gender is Male. Education: 8 years. MMSE: 28.0. Logical Memory: 1.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows normal volumes in most regions except for moderate atrophy in the middle temporal gyrus (Z-score -1.6, 5.5th percentile). The MMSE score of 28 is within the normal range, and hippocampal volume is preserved. The entorhinal cortex and fusiform gyrus show mild reductions but remain within normal limits.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (While the middle temporal gyrus atrophy is notable, the preserved hippocampal volume and high MMSE score suggest no significant cognitive impairment. However, age and APOE4 status warrant monitoring.)",
  "timestamp": "2025-07-26T12:39:48.918682"
}