{
  "ptid_time": "131_S_0436_2006-05-17",
  "img_path": "/data/qiuhui/data/adni/images/131_S_0436/2006-05-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 69,348 mm³, 47.5% above the reference mean. With a Z-score of 1.38 (91.6th percentile), this represents mild enlargement; hippocampal volume measures 7,176 mm³, 3.0% above the reference mean. With a Z-score of 0.26 (60.2th percentile), this represents normal volume ; whole brain volume measures 999,332 mm³, 2.9% below the reference mean. With a Z-score of -0.38 (35.2th percentile), this represents normal volume ; entorhinal cortex volume measures 2,843 mm³, 28.4% below the reference mean. With a Z-score of -1.86 (3.2th percentile), this represents moderate atrophy; fusiform gyrus volume measures 17,942 mm³, 0.7% below the reference mean. With a Z-score of -0.06 (47.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,609 mm³, 2.2% above the reference mean. With a Z-score of 0.19 (57.7th percentile), this represents normal volume . ",
  "text_data": "Age is 85.0 years. Gender is Male. Education: 12 years. MMSE: 29.0. Logical Memory: 16.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows mild ventricular enlargement and moderate entorhinal cortex atrophy, which are concerning for early neurodegenerative changes, but hippocampal and whole brain volumes are normal. The MMSE score of 29 is within the normal range, suggesting no significant cognitive impairment at this time.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (due to structural changes despite intact cognition)  \n**Confidence:** **Medium** (structural changes are present, but cognitive performance is still normal, making early MCI more likely than dementia)",
  "timestamp": "2025-07-26T15:05:19.556096"
}