{
  "ptid_time": "012_S_1212_2007-07-24",
  "img_path": "/data/qiuhui/data/adni/images/012_S_1212/2007-07-24/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 11,316 mm³, 59.7% below the reference mean. With a Z-score of -1.37 (8.6th percentile), this represents mild atrophy; hippocampal volume measures 7,453 mm³, 4.8% above the reference mean. With a Z-score of 0.44 (66.9th percentile), this represents normal volume ; whole brain volume measures 1,050,020 mm³, 7.7% above the reference mean. With a Z-score of 0.97 (83.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,905 mm³, 6.3% above the reference mean. With a Z-score of 0.39 (65.1th percentile), this represents normal volume ; fusiform gyrus volume measures 19,742 mm³, 16.0% above the reference mean. With a Z-score of 1.46 (92.8th percentile), this represents mild enlargement; middle temporal gyrus volume measures 23,314 mm³, 21.6% above the reference mean. With a Z-score of 1.88 (97.0th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 75.8 years. Gender is Female. Education: 17 years. MMSE: 27.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal or even enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). The MMSE score of 27 is within the normal range, and the absence of APOE4 reduces genetic risk for Alzheimer's. No significant atrophy is seen in Alzheimer’s-vulnerable regions.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T23:09:03.644295"
}