{
  "ptid_time": "022_S_0130_2006-08-16",
  "img_path": "/data/qiuhui/data/adni/images/022_S_0130/2006-08-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,801 mm³, 46.0% below the reference mean. With a Z-score of -1.10 (13.5th percentile), this represents mild atrophy; hippocampal volume measures 8,029 mm³, 6.2% above the reference mean. With a Z-score of 0.61 (72.8th percentile), this represents normal volume ; whole brain volume measures 1,215,430 mm³, 12.6% above the reference mean. With a Z-score of 1.64 (94.9th percentile), this represents moderate enlargement; entorhinal cortex volume measures 4,202 mm³, 2.5% above the reference mean. With a Z-score of 0.17 (56.7th percentile), this represents normal volume ; fusiform gyrus volume measures 20,358 mm³, 8.1% above the reference mean. With a Z-score of 0.69 (75.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 27,956 mm³, 31.0% above the reference mean. With a Z-score of 2.79 (99.7th percentile), this represents significant enlargement. ",
  "text_data": "Age is 73.6 years. Gender is Male. Education: 16 years. MMSE: 30.0. 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, and middle temporal gyrus). The MMSE score of 30 is intact, and the absence of APOE4 further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T02:03:53.135670"
}