{
  "ptid_time": "116_S_1083_2007-05-25",
  "img_path": "/data/qiuhui/data/adni/images/116_S_1083/2007-05-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,881 mm³, 43.4% below the reference mean. With a Z-score of -0.99 (16.0th percentile), this represents normal volume ; hippocampal volume measures 6,519 mm³, 8.4% below the reference mean. With a Z-score of -0.77 (22.1th percentile), this represents normal volume ; whole brain volume measures 1,010,260 mm³, 3.7% above the reference mean. With a Z-score of 0.46 (67.7th percentile), this represents normal volume ; entorhinal cortex volume measures 2,790 mm³, 24.0% below the reference mean. With a Z-score of -1.48 (7.0th percentile), this represents mild atrophy; fusiform gyrus volume measures 15,879 mm³, 6.7% below the reference mean. With a Z-score of -0.61 (27.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,529 mm³, 3.3% below the reference mean. With a Z-score of -0.29 (38.6th percentile), this represents normal volume . ",
  "text_data": "Age is 72.4 years. Gender is Female. Education: 16 years. MMSE: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "Reasoning: The entorhinal cortex shows mild atrophy (Z-score -1.48, 7th percentile), which is a key early marker for Alzheimer's pathology, while other brain regions (hippocampus, whole brain, etc.) are within normal ranges. The MMSE score of 26 is borderline but not definitively impaired, and the absence of APOE4 reduces genetic risk.  \nDiagnosis: **MCI (Mild Cognitive Impairment)**  \nConfidence: **Medium** (due to isolated entorhinal atrophy and borderline MMSE, but lack of broader atrophy or clear cognitive deficits)",
  "timestamp": "2025-07-26T11:59:55.595513"
}