{
  "ptid_time": "010_S_0420_2008-09-18",
  "img_path": "/data/qiuhui/data/adni/images/010_S_0420/2008-09-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,521 mm³, 46.7% below the reference mean. With a Z-score of -1.12 (13.2th percentile), this represents mild atrophy; hippocampal volume measures 7,013 mm³, 7.2% below the reference mean. With a Z-score of -0.70 (24.0th percentile), this represents normal volume ; whole brain volume measures 1,041,950 mm³, 3.5% below the reference mean. With a Z-score of -0.45 (32.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,855 mm³, 18.4% above the reference mean. With a Z-score of 1.25 (89.4th percentile), this represents mild enlargement; fusiform gyrus volume measures 19,087 mm³, 1.3% above the reference mean. With a Z-score of 0.11 (54.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,458 mm³, 9.9% above the reference mean. With a Z-score of 0.89 (81.4th percentile), this represents normal volume . ",
  "text_data": "Age is 75.4 years. Gender is Male. Education: 19 years. MMSE: 27.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Pittsburgh compound B: 1.12 SUVR (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows mild ventricular atrophy (Z-score -1.12) but otherwise normal hippocampal, whole brain, and other regional volumes. The MMSE score of 27 is within the normal range, and there is no APOE4 genetic risk factor. The mild atrophy is not strongly indicative of neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild ventricular atrophy, but no other significant structural or cognitive deficits)",
  "timestamp": "2025-07-25T22:31:04.413593"
}