{
  "ptid_time": "029_S_1215_2009-02-04",
  "img_path": "/data/qiuhui/data/adni/images/029_S_1215/2009-02-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 109,445 mm³, 132.8% above the reference mean. With a Z-score of 3.86 (100.0th percentile), this represents profound enlargement; hippocampal volume measures 7,353 mm³, 5.5% above the reference mean. With a Z-score of 0.48 (68.3th percentile), this represents normal volume ; whole brain volume measures 1,110,500 mm³, 7.9% above the reference mean. With a Z-score of 1.04 (85.0th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,103 mm³, 3.4% above the reference mean. With a Z-score of 0.22 (58.7th percentile), this represents normal volume ; fusiform gyrus volume measures 18,897 mm³, 4.6% above the reference mean. With a Z-score of 0.40 (65.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,155 mm³, 10.0% below the reference mean. With a Z-score of -0.90 (18.5th percentile), this represents normal volume . ",
  "text_data": "Age is 80.5 years. Gender is Male. Education: 16 years. MMSE: 29.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is profoundly enlarged (Z-score 3.86), which is strongly suggestive of neurodegeneration, but hippocampal, entorhinal cortex, and fusiform gyrus volumes are normal. The MMSE score of 29 is within the normal range, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (ventricular enlargement raises suspicion, but other markers and cognitive performance suggest no impairment)",
  "timestamp": "2025-07-26T04:22:52.981496"
}