{
  "ptid_time": "057_S_1265_2008-08-13",
  "img_path": "/data/qiuhui/data/adni/images/057_S_1265/2008-08-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,255 mm³, 45.2% below the reference mean. With a Z-score of -1.22 (11.1th percentile), this represents mild atrophy; hippocampal volume measures 5,752 mm³, 11.4% below the reference mean. With a Z-score of -0.92 (18.0th percentile), this represents normal volume ; whole brain volume measures 841,922 mm³, 9.3% below the reference mean. With a Z-score of -1.12 (13.2th percentile), this represents mild atrophy; entorhinal cortex volume measures 2,737 mm³, 21.0% below the reference mean. With a Z-score of -1.13 (12.9th percentile), this represents mild atrophy; fusiform gyrus volume measures 13,892 mm³, 13.8% below the reference mean. With a Z-score of -1.03 (15.0th percentile), this represents mild atrophy; middle temporal gyrus volume measures 14,870 mm³, 17.5% below the reference mean. With a Z-score of -1.56 (5.9th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 83.7 years. Gender is Female. Education: 8 years. MMSE: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild to moderate atrophy in multiple brain regions, including the ventricles, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus, with the latter showing the most significant atrophy (Z-score -1.56, 5.9th percentile). However, hippocampal volume is within normal limits (Z-score -0.92), and the MMSE score of 28 is within the normal range, suggesting preserved cognitive function despite structural changes.  \n\n**Diagnosis:** **Cognitively Normal (CN)**  \n**Confidence:** **Medium** (due to the discrepancy between structural atrophy and intact cognitive performance, which could suggest early preclinical changes or normal aging in an 83-year-old individual)",
  "timestamp": "2025-07-26T08:10:15.513244"
}