{
  "ptid_time": "016_S_1117_2008-08-28",
  "img_path": "/data/qiuhui/data/adni/images/016_S_1117/2008-08-28/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 17,231 mm³, 38.6% below the reference mean. With a Z-score of -0.88 (18.8th percentile), this represents normal volume ; hippocampal volume measures 6,335 mm³, 11.0% below the reference mean. With a Z-score of -1.00 (15.7th percentile), this represents mild atrophy; whole brain volume measures 900,681 mm³, 7.6% below the reference mean. With a Z-score of -0.96 (17.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,222 mm³, 12.3% below the reference mean. With a Z-score of -0.75 (22.6th percentile), this represents normal volume ; fusiform gyrus volume measures 13,184 mm³, 22.5% below the reference mean. With a Z-score of -2.05 (2.0th percentile), this represents significant atrophy; middle temporal gyrus volume measures 16,920 mm³, 11.7% below the reference mean. With a Z-score of -1.02 (15.4th percentile), this represents mild atrophy. ",
  "text_data": "Age is 70.4 years. Gender is Female. Education: 18 years. MMSE: 24.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging shows mild atrophy in the hippocampus and middle temporal gyrus, with significant atrophy in the fusiform gyrus—key regions affected in Alzheimer’s disease. The MMSE score of 24 suggests mild cognitive impairment, and the absence of APOE4 reduces but does not eliminate Alzheimer’s risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to mixed imaging findings and borderline MMSE, but no clear dementia-level impairment yet)",
  "timestamp": "2025-07-26T00:13:22.356425"
}