{
  "ptid_time": "072_S_4057_2011-12-12",
  "img_path": "/data/qiuhui/data/adni/images/072_S_4057/2011-12-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,811 mm³, 32.3% below the reference mean. With a Z-score of -0.94 (17.4th percentile), this represents normal volume ; hippocampal volume measures 6,722 mm³, 3.5% below the reference mean. With a Z-score of -0.31 (38.0th percentile), this represents normal volume ; whole brain volume measures 1,093,260 mm³, 6.2% above the reference mean. With a Z-score of 0.82 (79.3th percentile), this represents normal volume ; entorhinal cortex volume measures 2,302 mm³, 42.0% below the reference mean. With a Z-score of -2.75 (0.3th percentile), this represents significant atrophy; fusiform gyrus volume measures 17,390 mm³, 3.7% below the reference mean. With a Z-score of -0.32 (37.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,926 mm³, 16.1% below the reference mean. With a Z-score of -1.44 (7.5th percentile), this represents mild atrophy. ",
  "text_data": "Age is 81.6 years. Gender is Male. Education: 16 years. MMSE: 21.0. MoCA: 18.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "Reasoning: The entorhinal cortex shows significant atrophy (Z-score -2.75, 0.3rd percentile), which is strongly associated with Alzheimer's pathology. The middle temporal gyrus also exhibits mild atrophy (Z-score -1.44, 7.5th percentile). Cognitive scores (MMSE 21, MoCA 18) are below normal thresholds, consistent with cognitive impairment. APOE4 positivity increases Alzheimer's risk.  \n\nDiagnosis: Dementia (likely Alzheimer’s disease)  \nConfidence: High",
  "timestamp": "2025-07-26T09:15:53.572490"
}