{
  "ptid_time": "114_S_1106_2008-12-01",
  "img_path": "/data/qiuhui/data/adni/images/114_S_1106/2008-12-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,916 mm³, 6.6% above the reference mean. With a Z-score of 0.15 (56.0th percentile), this represents normal volume ; hippocampal volume measures 6,234 mm³, 12.4% below the reference mean. With a Z-score of -1.14 (12.8th percentile), this represents mild atrophy; whole brain volume measures 930,216 mm³, 4.6% below the reference mean. With a Z-score of -0.57 (28.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,608 mm³, 1.8% below the reference mean. With a Z-score of -0.11 (45.7th percentile), this represents normal volume ; fusiform gyrus volume measures 14,436 mm³, 15.1% below the reference mean. With a Z-score of -1.38 (8.4th percentile), this represents mild atrophy; middle temporal gyrus volume measures 16,769 mm³, 12.5% below the reference mean. With a Z-score of -1.09 (13.9th percentile), this represents mild atrophy. ",
  "text_data": "Age is 76.0 years. Gender is Female. Education: 18 years. MMSE: 28.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.14, 12.8th percentile), along with mild atrophy in the fusiform gyrus (Z-score -1.38) and middle temporal gyrus (Z-score -1.09). However, the MMSE score is normal (28/30), and ventricular/whole brain volumes are within normal limits. The absence of APOE4 and preserved cognitive function suggest early neurodegeneration but not yet dementia.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to structural atrophy without significant cognitive decline yet)",
  "timestamp": "2025-07-26T11:44:19.894718"
}