{
  "ptid_time": "012_S_1165_2007-07-12",
  "img_path": "/data/qiuhui/data/adni/images/012_S_1165/2007-07-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 42,499 mm³, 9.6% below the reference mean. With a Z-score of -0.28 (39.0th percentile), this represents normal volume ; hippocampal volume measures 7,463 mm³, 7.1% above the reference mean. With a Z-score of 0.61 (73.0th percentile), this represents normal volume ; whole brain volume measures 987,423 mm³, 4.1% below the reference mean. With a Z-score of -0.53 (29.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,571 mm³, 15.2% above the reference mean. With a Z-score of 0.99 (84.0th percentile), this represents normal volume ; fusiform gyrus volume measures 17,206 mm³, 4.8% below the reference mean. With a Z-score of -0.41 (34.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,170 mm³, 4.9% above the reference mean. With a Z-score of 0.44 (67.1th percentile), this represents normal volume . ",
  "text_data": "Age is 81.9 years. Gender is Male. Education: 19 years. MMSE: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. The MMSE score of 28 is within the normal range (≥26), and while the presence of one APOE4 allele increases Alzheimer's risk, there is no structural or cognitive evidence of impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T23:08:27.551626"
}