{
  "ptid_time": "006_S_0498_2008-10-02",
  "img_path": "/data/qiuhui/data/adni/images/006_S_0498/2008-10-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,809 mm³, 1.8% below the reference mean. With a Z-score of -0.04 (48.2th percentile), this represents normal volume ; hippocampal volume measures 7,684 mm³, 1.7% above the reference mean. With a Z-score of 0.16 (56.4th percentile), this represents normal volume ; whole brain volume measures 1,105,130 mm³, 2.4% above the reference mean. With a Z-score of 0.31 (62.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,921 mm³, 4.4% below the reference mean. With a Z-score of -0.30 (38.3th percentile), this represents normal volume ; fusiform gyrus volume measures 19,695 mm³, 4.5% above the reference mean. With a Z-score of 0.39 (65.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,417 mm³, 0.4% above the reference mean. With a Z-score of 0.03 (51.3th percentile), this represents normal volume . ",
  "text_data": "Age is 72.3 years. Gender is Male. Education: 12 years. MMSE: 28.0. Logical Memory: 21.0. APOEε4 alleles: 1.0. Biomarker levels: Pittsburgh compound B: 1.21 SUVR (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges (Z-scores between -0.30 and +0.39, percentiles 38.3–65.1). The MMSE score of 28 is within the normal range (≥26), and there is no significant atrophy or biomarker evidence of neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:26:39.050317"
}