{
  "ptid_time": "136_S_0429_2009-07-13",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0429/2009-07-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,247 mm³, 7.4% above the reference mean. With a Z-score of 0.18 (57.0th percentile), this represents normal volume ; hippocampal volume measures 8,135 mm³, 1.3% above the reference mean. With a Z-score of 0.13 (55.3th percentile), this represents normal volume ; whole brain volume measures 1,256,280 mm³, 10.7% above the reference mean. With a Z-score of 1.52 (93.6th percentile), this represents moderate enlargement; entorhinal cortex volume measures 3,557 mm³, 16.6% below the reference mean. With a Z-score of -1.15 (12.6th percentile), this represents mild atrophy; fusiform gyrus volume measures 18,991 mm³, 4.6% below the reference mean. With a Z-score of -0.38 (35.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,297 mm³, 9.4% below the reference mean. With a Z-score of -0.78 (21.9th percentile), this represents normal volume . ",
  "text_data": "Age is 65.7 years. Gender is Male. Education: 12 years. MMSE: 26.0. Logical Memory: 3.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The entorhinal cortex shows mild atrophy (16.6% below reference mean, Z-score -1.15), which is a key early marker for Alzheimer's pathology. However, hippocampal and whole brain volumes are normal or enlarged, and MMSE (26/30) is only mildly impaired, suggesting no significant cognitive decline. APOE4-negative status also reduces Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to isolated entorhinal atrophy but otherwise normal biomarkers and borderline MMSE)",
  "timestamp": "2025-07-26T16:02:29.780075"
}