{
  "ptid_time": "033_S_0920_2008-10-06",
  "img_path": "/data/qiuhui/data/adni/images/033_S_0920/2008-10-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,522 mm³, 23.2% above the reference mean. With a Z-score of 0.62 (73.4th percentile), this represents normal volume ; hippocampal volume measures 5,801 mm³, 10.7% below the reference mean. With a Z-score of -0.86 (19.6th percentile), this represents normal volume ; whole brain volume measures 956,242 mm³, 3.0% above the reference mean. With a Z-score of 0.36 (64.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,167 mm³, 8.5% below the reference mean. With a Z-score of -0.46 (32.2th percentile), this represents normal volume ; fusiform gyrus volume measures 15,482 mm³, 3.9% below the reference mean. With a Z-score of -0.29 (38.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 15,755 mm³, 12.6% below the reference mean. With a Z-score of -1.12 (13.1th percentile), this represents mild atrophy. ",
  "text_data": "Age is 82.0 years. Gender is Female. Education: 12 years. MMSE: 29.0. Logical Memory: 12.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mild atrophy in the middle temporal gyrus but otherwise normal volumes in other regions, including the hippocampus and entorhinal cortex. The MMSE score of 29 is within the normal range, and while the APOE4 allele is present (a risk factor), there is no strong evidence of significant cognitive impairment or widespread neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in the middle temporal gyrus, but preserved cognition and mostly normal volumes)",
  "timestamp": "2025-07-26T05:22:45.410009"
}