{
  "ptid_time": "100_S_0069_2009-03-18",
  "img_path": "/data/qiuhui/data/adni/images/100_S_0069/2009-03-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 36,707 mm³, 4.7% below the reference mean. With a Z-score of -0.11 (45.5th percentile), this represents normal volume ; hippocampal volume measures 7,866 mm³, 4.1% above the reference mean. With a Z-score of 0.40 (65.4th percentile), this represents normal volume ; whole brain volume measures 1,147,990 mm³, 6.4% above the reference mean. With a Z-score of 0.82 (79.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,814 mm³, 7.0% below the reference mean. With a Z-score of -0.47 (31.8th percentile), this represents normal volume ; fusiform gyrus volume measures 18,919 mm³, 0.4% above the reference mean. With a Z-score of 0.04 (51.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,369 mm³, 4.8% above the reference mean. With a Z-score of 0.43 (66.8th percentile), this represents normal volume . ",
  "text_data": "Age is 75.9 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. ",
  "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 based on Z-scores and percentiles. The MMSE score of 30/30 indicates no cognitive impairment, and the absence of APOE4 alleles reduces genetic risk for Alzheimer’s.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:16:19.491702"
}