{
  "ptid_time": "014_S_0548_2007-06-12",
  "img_path": "/data/qiuhui/data/adni/images/014_S_0548/2007-06-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,245 mm³, 49.2% below the reference mean. With a Z-score of -1.13 (13.0th percentile), this represents mild atrophy; hippocampal volume measures 7,689 mm³, 8.1% above the reference mean. With a Z-score of 0.74 (77.1th percentile), this represents normal volume ; whole brain volume measures 1,077,030 mm³, 10.5% above the reference mean. With a Z-score of 1.32 (90.7th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,053 mm³, 10.3% above the reference mean. With a Z-score of 0.64 (73.7th percentile), this represents normal volume ; fusiform gyrus volume measures 19,053 mm³, 12.0% above the reference mean. With a Z-score of 1.09 (86.2th percentile), this represents mild enlargement; middle temporal gyrus volume measures 19,402 mm³, 1.2% above the reference mean. With a Z-score of 0.11 (54.2th percentile), this represents normal volume . ",
  "text_data": "Age is 74.6 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 imaging shows mild ventricular atrophy (Z-score -1.13), but hippocampal, entorhinal cortex, and other key regions are normal or even mildly enlarged. The MMSE score of 29 is within the normal range, and while APOE4 is a risk factor, there are no significant structural or cognitive deficits suggestive of neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T23:42:30.412474"
}