{
  "ptid_time": "100_S_0995_2009-11-23",
  "img_path": "/data/qiuhui/data/adni/images/100_S_0995/2009-11-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 36,676 mm³, 0.8% below the reference mean. With a Z-score of -0.02 (49.2th percentile), this represents normal volume ; hippocampal volume measures 4,215 mm³, 35.1% below the reference mean. With a Z-score of -2.81 (0.2th percentile), this represents significant atrophy; whole brain volume measures 942,893 mm³, 1.6% above the reference mean. With a Z-score of 0.19 (57.5th percentile), this represents normal volume ; entorhinal cortex volume measures 2,363 mm³, 31.8% below the reference mean. With a Z-score of -1.71 (4.3th percentile), this represents moderate atrophy; fusiform gyrus volume measures 15,977 mm³, 0.8% below the reference mean. With a Z-score of -0.06 (47.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,140 mm³, 0.6% above the reference mean. With a Z-score of 0.05 (52.2th percentile), this represents normal volume . ",
  "text_data": "Age is 81.5 years. Gender is Female. Education: 12 years. MMSE: 21.0. Logical Memory: 0.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The patient shows significant hippocampal atrophy (Z-score -2.81, 0.2th percentile) and moderate entorhinal cortex atrophy (Z-score -1.71, 4.3th percentile), both key regions affected in Alzheimer's disease. The MMSE score of 21 indicates cognitive impairment, and the presence of one APOE4 allele increases Alzheimer's risk.  \n\n**Diagnosis:** Dementia (likely Alzheimer’s disease)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:21:11.849418"
}