{
  "ptid_time": "123_S_0162_2006-11-02",
  "img_path": "/data/qiuhui/data/adni/images/123_S_0162/2006-11-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,051 mm³, 3.8% below the reference mean. With a Z-score of -0.09 (46.4th percentile), this represents normal volume ; hippocampal volume measures 6,940 mm³, 8.2% below the reference mean. With a Z-score of -0.80 (21.2th percentile), this represents normal volume ; whole brain volume measures 1,149,360 mm³, 6.5% above the reference mean. With a Z-score of 0.84 (80.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,743 mm³, 8.7% below the reference mean. With a Z-score of -0.59 (27.7th percentile), this represents normal volume ; fusiform gyrus volume measures 16,309 mm³, 13.4% below the reference mean. With a Z-score of -1.14 (12.6th percentile), this represents mild atrophy; middle temporal gyrus volume measures 24,755 mm³, 16.0% above the reference mean. With a Z-score of 1.44 (92.5th percentile), this represents mild enlargement. ",
  "text_data": "Age is 72.3 years. Gender is Male. Education: 18 years. MMSE: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with mild atrophy in the fusiform gyrus and mild enlargement in the middle temporal gyrus. The MMSE score of 28 is within the normal range, and there are no significant cognitive deficits reported. The APOE4 allele (heterozygous) slightly increases Alzheimer's risk but does not confirm pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild fusiform atrophy, but no clear cognitive impairment)",
  "timestamp": "2025-07-26T12:26:35.772870"
}