{
  "ptid_time": "011_S_4105_2012-08-06",
  "img_path": "/data/qiuhui/data/adni/images/011_S_4105/2012-08-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 53,123 mm³, 89.3% above the reference mean. With a Z-score of 2.04 (98.0th percentile), this represents significant enlargement; hippocampal volume measures 7,184 mm³, 1.0% above the reference mean. With a Z-score of 0.09 (53.6th percentile), this represents normal volume ; whole brain volume measures 995,996 mm³, 2.2% above the reference mean. With a Z-score of 0.28 (60.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,030 mm³, 17.5% below the reference mean. With a Z-score of -1.07 (14.1th percentile), this represents mild atrophy; fusiform gyrus volume measures 15,621 mm³, 8.2% below the reference mean. With a Z-score of -0.74 (22.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,630 mm³, 2.8% below the reference mean. With a Z-score of -0.24 (40.4th percentile), this represents normal volume . ",
  "text_data": "Age is 71.8 years. Gender is Female. Education: 18 years. MMSE: 27.0. MoCA: 25.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant ventricular enlargement (98th percentile) and mild entorhinal cortex atrophy (14th percentile), while hippocampal and whole brain volumes are within normal ranges. Cognitive scores (MMSE 27, MoCA 25) are borderline but not strongly indicative of impairment. The absence of APOE4 reduces genetic risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Structural changes suggest early neurodegeneration, but cognitive scores are not strongly impaired, and APOE4 status is negative.)",
  "timestamp": "2025-07-25T22:53:39.381420"
}