{
  "ptid_time": "126_S_1221_2009-01-27",
  "img_path": "/data/qiuhui/data/adni/images/126_S_1221/2009-01-27/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 73,071 mm³, 89.7% above the reference mean. With a Z-score of 2.15 (98.4th percentile), this represents significant enlargement; hippocampal volume measures 4,614 mm³, 39.0% below the reference mean. With a Z-score of -3.80 (0.0th percentile), this represents profound atrophy; whole brain volume measures 1,055,660 mm³, 2.2% below the reference mean. With a Z-score of -0.29 (38.8th percentile), this represents normal volume ; entorhinal cortex volume measures 2,324 mm³, 43.3% below the reference mean. With a Z-score of -2.94 (0.2th percentile), this represents significant atrophy; fusiform gyrus volume measures 17,851 mm³, 5.2% below the reference mean. With a Z-score of -0.45 (32.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,595 mm³, 17.5% below the reference mean. With a Z-score of -1.58 (5.7th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 73.2 years. Gender is Male. Education: 6 years. MMSE: 21.0. Logical Memory: 0.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The data shows profound hippocampal and entorhinal cortex atrophy, which are hallmark features of Alzheimer's disease (AD). Ventricular enlargement and middle temporal gyrus atrophy further support neurodegeneration, while the MMSE score of 21 indicates cognitive impairment.  \n\n**Diagnosis:** **Dementia** (likely Alzheimer’s disease)  \n**Confidence:** **High**",
  "timestamp": "2025-07-26T12:43:16.192077"
}