{
  "ptid_time": "128_S_0715_2007-01-29",
  "img_path": "/data/qiuhui/data/adni/images/128_S_0715/2007-01-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 55,906 mm³, 51.2% above the reference mean. With a Z-score of 1.38 (91.7th percentile), this represents mild enlargement; hippocampal volume measures 5,955 mm³, 8.3% below the reference mean. With a Z-score of -0.67 (25.3th percentile), this represents normal volume ; whole brain volume measures 982,832 mm³, 5.9% above the reference mean. With a Z-score of 0.71 (76.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,520 mm³, 1.7% above the reference mean. With a Z-score of 0.09 (53.6th percentile), this represents normal volume ; fusiform gyrus volume measures 14,732 mm³, 8.6% below the reference mean. With a Z-score of -0.64 (26.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,664 mm³, 9.1% above the reference mean. With a Z-score of 0.81 (79.0th percentile), this represents normal volume . ",
  "text_data": "Age is 80.5 years. Gender is Female. Education: 13 years. MMSE: 27.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (Z-score 1.38), which can be associated with age-related atrophy, but hippocampal and other regional volumes are within normal ranges (Z-scores close to 0). The MMSE score of 27 is within the normal range (≥26), and the absence of APOE4 reduces genetic risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild ventricular enlargement could indicate early changes, but no other significant structural or cognitive deficits are present)",
  "timestamp": "2025-07-26T13:48:58.656418"
}