{
  "ptid_time": "007_S_0414_2007-12-17",
  "img_path": "/data/qiuhui/data/adni/images/007_S_0414/2007-12-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,203 mm³, 0.6% above the reference mean. With a Z-score of 0.02 (50.7th percentile), this represents normal volume ; hippocampal volume measures 4,169 mm³, 35.8% below the reference mean. With a Z-score of -2.87 (0.2th percentile), this represents significant atrophy; whole brain volume measures 874,444 mm³, 5.8% below the reference mean. With a Z-score of -0.69 (24.4th percentile), this represents normal volume ; entorhinal cortex volume measures 2,378 mm³, 31.3% below the reference mean. With a Z-score of -1.69 (4.5th percentile), this represents moderate atrophy; fusiform gyrus volume measures 14,006 mm³, 13.1% below the reference mean. With a Z-score of -0.98 (16.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 15,125 mm³, 16.1% below the reference mean. With a Z-score of -1.43 (7.6th percentile), this represents mild atrophy. ",
  "text_data": "Age is 81.1 years. Gender is Female. Education: 18 years. MMSE: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows significant atrophy (Z-score -2.87, 0.2th percentile), and the entorhinal cortex has moderate atrophy (Z-score -1.69, 4.5th percentile), both strongly associated with Alzheimer's pathology. However, the MMSE score of 28 is within the normal range, suggesting preserved cognitive function despite structural changes.  \n\n**Diagnosis:** **MCI (Mild Cognitive Impairment)**  \n**Confidence:** **Medium** (due to the discrepancy between significant hippocampal atrophy and normal MMSE, which may indicate preclinical or very early-stage impairment).",
  "timestamp": "2025-07-25T21:50:42.893212"
}