{
  "ptid_time": "136_S_0429_2007-12-17",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0429/2007-12-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,975 mm³, 3.5% below the reference mean. With a Z-score of -0.08 (46.7th percentile), this represents normal volume ; hippocampal volume measures 8,445 mm³, 5.2% above the reference mean. With a Z-score of 0.52 (69.9th percentile), this represents normal volume ; whole brain volume measures 1,287,930 mm³, 13.5% above the reference mean. With a Z-score of 1.91 (97.2th percentile), this represents moderate enlargement; entorhinal cortex volume measures 3,677 mm³, 13.7% below the reference mean. With a Z-score of -0.95 (17.1th percentile), this represents normal volume ; fusiform gyrus volume measures 18,514 mm³, 7.0% below the reference mean. With a Z-score of -0.58 (28.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,877 mm³, 6.8% below the reference mean. With a Z-score of -0.56 (28.6th percentile), this represents normal volume . ",
  "text_data": "Age is 64.2 years. Gender is Male. Education: 12 years. MMSE: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are largely within normal ranges or slightly above/below reference means, with no significant atrophy in key Alzheimer’s-related regions. The MMSE score of 26 is borderline but not definitively impaired, and the absence of APOE4 reduces genetic risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (MMSE is slightly low, but structural imaging and genetic factors do not suggest pathology)",
  "timestamp": "2025-07-26T16:02:07.885555"
}