{
  "ptid_time": "109_S_0967_2007-12-17",
  "img_path": "/data/qiuhui/data/adni/images/109_S_0967/2007-12-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,122 mm³, 6.8% above the reference mean. With a Z-score of 0.16 (56.4th percentile), this represents normal volume ; hippocampal volume measures 7,427 mm³, 1.7% below the reference mean. With a Z-score of -0.17 (43.2th percentile), this represents normal volume ; whole brain volume measures 936,386 mm³, 13.2% below the reference mean. With a Z-score of -1.72 (4.3th percentile), this represents moderate atrophy; entorhinal cortex volume measures 3,483 mm³, 15.1% below the reference mean. With a Z-score of -1.02 (15.4th percentile), this represents mild atrophy; fusiform gyrus volume measures 15,535 mm³, 17.5% below the reference mean. With a Z-score of -1.49 (6.8th percentile), this represents mild atrophy; middle temporal gyrus volume measures 19,753 mm³, 7.4% below the reference mean. With a Z-score of -0.67 (25.2th percentile), this represents normal volume . ",
  "text_data": "Age is 77.8 years. Gender is Male. Education: 20 years. MMSE: 30.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The whole brain volume shows moderate atrophy (Z-score -1.72, 4.3rd percentile), while the entorhinal cortex and fusiform gyrus exhibit mild atrophy. However, hippocampal volume is normal, and MMSE is intact (30/30). No APOE4 risk allele is present.  \n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Structural changes suggest early neurodegeneration, but cognitive performance remains intact, and APOE4 status is negative.)",
  "timestamp": "2025-07-26T11:28:48.933775"
}