{
  "ptid_time": "062_S_1299_2009-03-11",
  "img_path": "/data/qiuhui/data/adni/images/062_S_1299/2009-03-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 75,020 mm³, 94.8% above the reference mean. With a Z-score of 2.27 (98.8th percentile), this represents significant enlargement; hippocampal volume measures 6,005 mm³, 20.6% below the reference mean. With a Z-score of -2.01 (2.2th percentile), this represents significant atrophy; whole brain volume measures 1,128,120 mm³, 4.5% above the reference mean. With a Z-score of 0.59 (72.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,773 mm³, 8.0% below the reference mean. With a Z-score of -0.54 (29.4th percentile), this represents normal volume ; fusiform gyrus volume measures 17,612 mm³, 6.5% below the reference mean. With a Z-score of -0.55 (29.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,737 mm³, 12.2% below the reference mean. With a Z-score of -1.10 (13.7th percentile), this represents mild atrophy. ",
  "text_data": "Age is 73.8 years. Gender is Male. Education: 14 years. MMSE: 19.0. Logical Memory: 0.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant hippocampal atrophy (Z-score -2.01) and ventricular enlargement (Z-score 2.27), both strong biomarkers for Alzheimer's disease. The MMSE score of 19 indicates cognitive impairment, and while APOE4 is absent, the structural changes are highly suggestive of neurodegeneration.  \n\n**Diagnosis:** Dementia (likely Alzheimer’s disease)  \n**Confidence:** High",
  "timestamp": "2025-07-26T08:20:36.456244"
}