{
  "ptid_time": "100_S_0069_2006-07-20",
  "img_path": "/data/qiuhui/data/adni/images/100_S_0069/2006-07-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,331 mm³, 18.7% below the reference mean. With a Z-score of -0.45 (32.7th percentile), this represents normal volume ; hippocampal volume measures 8,353 mm³, 10.5% above the reference mean. With a Z-score of 1.02 (84.7th percentile), this represents mild enlargement; whole brain volume measures 1,192,590 mm³, 10.5% above the reference mean. With a Z-score of 1.36 (91.3th percentile), this represents mild enlargement; entorhinal cortex volume measures 3,802 mm³, 7.3% below the reference mean. With a Z-score of -0.49 (31.1th percentile), this represents normal volume ; fusiform gyrus volume measures 20,161 mm³, 7.0% above the reference mean. With a Z-score of 0.60 (72.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,800 mm³, 11.5% above the reference mean. With a Z-score of 1.04 (85.0th percentile), this represents mild enlargement. ",
  "text_data": "Age is 73.4 years. Gender is Male. Education: 16 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or mildly enlarged structures, with no significant atrophy in key regions like the hippocampus or entorhinal cortex. The MMSE score of 28 is within the normal range, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:15:59.936770"
}