{
  "ptid_time": "032_S_0677_2007-04-03",
  "img_path": "/data/qiuhui/data/adni/images/032_S_0677/2007-04-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,348 mm³, 44.6% below the reference mean. With a Z-score of -1.07 (14.3th percentile), this represents mild atrophy; hippocampal volume measures 8,870 mm³, 17.3% above the reference mean. With a Z-score of 1.69 (95.5th percentile), this represents moderate enlargement; whole brain volume measures 1,079,780 mm³, 0.0% above the reference mean. With a Z-score of 0.00 (50.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,716 mm³, 15.0% above the reference mean. With a Z-score of 1.02 (84.6th percentile), this represents mild enlargement; fusiform gyrus volume measures 20,468 mm³, 8.7% above the reference mean. With a Z-score of 0.74 (76.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,865 mm³, 2.5% above the reference mean. With a Z-score of 0.22 (58.8th percentile), this represents normal volume . ",
  "text_data": "Age is 71.3 years. Gender is Male. Education: 18 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy (Z-score -1.07) but otherwise normal or even enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). The MMSE score of 28 is within the normal range, and the absence of APOE4 alleles reduces genetic risk. No significant atrophy in Alzheimer’s-related regions is observed.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T04:56:18.782041"
}