{
  "ptid_time": "022_S_0014_2007-12-06",
  "img_path": "/data/qiuhui/data/adni/images/022_S_0014/2007-12-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 52,242 mm³, 41.3% above the reference mean. With a Z-score of 1.12 (86.8th percentile), this represents mild enlargement; hippocampal volume measures 6,280 mm³, 3.3% below the reference mean. With a Z-score of -0.27 (39.5th percentile), this represents normal volume ; whole brain volume measures 824,780 mm³, 11.1% below the reference mean. With a Z-score of -1.34 (9.1th percentile), this represents mild atrophy; entorhinal cortex volume measures 2,928 mm³, 15.4% below the reference mean. With a Z-score of -0.83 (20.2th percentile), this represents normal volume ; fusiform gyrus volume measures 12,379 mm³, 23.2% below the reference mean. With a Z-score of -1.74 (4.1th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 16,265 mm³, 9.8% below the reference mean. With a Z-score of -0.87 (19.2th percentile), this represents normal volume . ",
  "text_data": "Age is 80.5 years. Gender is Female. Education: 12 years. MMSE: 30.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement and mild-to-moderate atrophy in whole brain and fusiform gyrus, but hippocampal and entorhinal cortex volumes are within normal ranges. The MMSE score of 30 is intact, and there is no APOE4 risk allele.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Structural changes are present but not severe enough to indicate MCI or dementia, and cognitive testing remains normal. However, age-related atrophy could be a factor.)",
  "timestamp": "2025-07-26T01:58:38.497604"
}