{
  "ptid_time": "009_S_4388_2012-07-09",
  "img_path": "/data/qiuhui/data/adni/images/009_S_4388/2012-07-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,402 mm³, 24.6% above the reference mean. With a Z-score of 0.58 (72.0th percentile), this represents normal volume ; hippocampal volume measures 8,655 mm³, 7.8% above the reference mean. With a Z-score of 0.78 (78.3th percentile), this represents normal volume ; whole brain volume measures 1,155,670 mm³, 1.9% above the reference mean. With a Z-score of 0.26 (60.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,835 mm³, 10.0% below the reference mean. With a Z-score of -0.69 (24.4th percentile), this represents normal volume ; fusiform gyrus volume measures 19,158 mm³, 3.8% below the reference mean. With a Z-score of -0.31 (37.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,039 mm³, 2.8% above the reference mean. With a Z-score of 0.23 (59.1th percentile), this represents normal volume . ",
  "text_data": "Age is 67.3 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 27.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive screening (MMSE 30, MoCA 27) is intact, and while APOE4 homozygosity increases Alzheimer's risk, there is currently no evidence of cognitive or structural decline.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to APOE4 risk but no current impairment)",
  "timestamp": "2025-07-25T22:20:28.014074"
}