{
  "ptid_time": "141_S_0810_2009-06-25",
  "img_path": "/data/qiuhui/data/adni/images/141_S_0810/2009-06-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 55,229 mm³, 17.5% above the reference mean. With a Z-score of 0.51 (69.4th percentile), this represents normal volume ; hippocampal volume measures 7,002 mm³, 0.5% above the reference mean. With a Z-score of 0.04 (51.7th percentile), this represents normal volume ; whole brain volume measures 989,162 mm³, 3.9% below the reference mean. With a Z-score of -0.51 (30.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,806 mm³, 21.1% above the reference mean. With a Z-score of 1.38 (91.6th percentile), this represents mild enlargement; fusiform gyrus volume measures 15,157 mm³, 16.1% below the reference mean. With a Z-score of -1.39 (8.2th percentile), this represents mild atrophy; middle temporal gyrus volume measures 19,995 mm³, 0.9% below the reference mean. With a Z-score of -0.08 (46.9th percentile), this represents normal volume . ",
  "text_data": "Age is 85.3 years. Gender is Male. Education: 16 years. MMSE: 29.0. Logical Memory: 6.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measures show mostly normal values, with the exception of mild enlargement in the entorhinal cortex and mild atrophy in the fusiform gyrus. The MMSE score of 29 is within the normal range, and there is no APOE4 allele present, which reduces genetic risk for Alzheimer's.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in the fusiform gyrus, but overall normal cognitive function and no significant hippocampal or whole",
  "timestamp": "2025-07-26T16:50:02.444240"
}