{
  "ptid_time": "126_S_1077_2008-06-25",
  "img_path": "/data/qiuhui/data/adni/images/126_S_1077/2008-06-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 43,473 mm³, 7.5% below the reference mean. With a Z-score of -0.22 (41.3th percentile), this represents normal volume ; hippocampal volume measures 7,831 mm³, 12.4% above the reference mean. With a Z-score of 1.07 (85.8th percentile), this represents mild enlargement; whole brain volume measures 1,024,020 mm³, 0.5% below the reference mean. With a Z-score of -0.07 (47.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,611 mm³, 9.0% below the reference mean. With a Z-score of -0.59 (27.7th percentile), this represents normal volume ; fusiform gyrus volume measures 16,122 mm³, 10.8% below the reference mean. With a Z-score of -0.93 (17.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,431 mm³, 1.3% above the reference mean. With a Z-score of 0.12 (54.6th percentile), this represents normal volume . ",
  "text_data": "Age is 84.8 years. Gender is Male. Education: 15 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only mild deviations (e.g., slightly enlarged hippocampus and mildly reduced entorhinal cortex and fusiform gyrus volumes). The MMSE score of 28 is within the normal range, and the absence of APOE4 alleles reduces genetic risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:42:02.619389"
}