{
  "ptid_time": "116_S_0648_2007-02-15",
  "img_path": "/data/qiuhui/data/adni/images/116_S_0648/2007-02-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 13,081 mm³, 53.4% below the reference mean. With a Z-score of -1.22 (11.1th percentile), this represents mild atrophy; hippocampal volume measures 8,416 mm³, 18.3% above the reference mean. With a Z-score of 1.68 (95.3th percentile), this represents moderate enlargement; whole brain volume measures 1,190,640 mm³, 22.2% above the reference mean. With a Z-score of 2.79 (99.7th percentile), this represents significant enlargement; entorhinal cortex volume measures 3,756 mm³, 2.3% above the reference mean. With a Z-score of 0.14 (55.5th percentile), this represents normal volume ; fusiform gyrus volume measures 17,512 mm³, 2.9% above the reference mean. With a Z-score of 0.27 (60.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,921 mm³, 19.6% above the reference mean. With a Z-score of 1.70 (95.5th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 72.0 years. Gender is Female. Education: 14 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild ventricular atrophy but otherwise reveals above-average volumes in the hippocampus, whole brain, and middle temporal gyrus, with normal volumes in the entorhinal cortex and fusiform gyrus. The MMSE score of 29 is within the normal range, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:55:16.453649"
}