{
  "ptid_time": "023_S_0078_2007-08-01",
  "img_path": "/data/qiuhui/data/adni/images/023_S_0078/2007-08-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 56,818 mm³, 102.4% above the reference mean. With a Z-score of 2.35 (99.1th percentile), this represents significant enlargement; hippocampal volume measures 6,075 mm³, 14.6% below the reference mean. With a Z-score of -1.34 (9.0th percentile), this represents mild atrophy; whole brain volume measures 981,796 mm³, 0.7% above the reference mean. With a Z-score of 0.09 (53.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,039 mm³, 17.3% below the reference mean. With a Z-score of -1.06 (14.5th percentile), this represents mild atrophy; fusiform gyrus volume measures 14,698 mm³, 13.6% below the reference mean. With a Z-score of -1.24 (10.8th percentile), this represents mild atrophy; middle temporal gyrus volume measures 18,029 mm³, 5.9% below the reference mean. With a Z-score of -0.52 (30.3th percentile), this represents normal volume . ",
  "text_data": "Age is 77.5 years. Gender is Female. Education: 18 years. MMSE: 9.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "Reasoning: The patient shows significant ventricular enlargement (Z-score 2.35) and mild atrophy in the hippocampus, entorhinal cortex, and fusiform gyrus—key regions affected in Alzheimer's disease. The severe cognitive impairment (MMSE 9.0) and APOE4 carrier status further support neurodegeneration consistent with dementia.  \n\nDiagnosis: **Dementia** (likely Alzheimer’s disease)  \nConfidence: **High**",
  "timestamp": "2025-07-26T02:33:46.003970"
}