{
  "ptid_time": "123_S_0072_2007-01-18",
  "img_path": "/data/qiuhui/data/adni/images/123_S_0072/2007-01-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,413 mm³, 23.6% below the reference mean. With a Z-score of -0.57 (28.6th percentile), this represents normal volume ; hippocampal volume measures 7,871 mm³, 4.1% above the reference mean. With a Z-score of 0.40 (65.6th percentile), this represents normal volume ; whole brain volume measures 1,067,900 mm³, 1.1% below the reference mean. With a Z-score of -0.14 (44.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,469 mm³, 9.0% above the reference mean. With a Z-score of 0.61 (72.9th percentile), this represents normal volume ; fusiform gyrus volume measures 19,169 mm³, 1.8% above the reference mean. With a Z-score of 0.15 (55.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,386 mm³, 9.6% above the reference mean. With a Z-score of 0.86 (80.6th percentile), this represents normal volume . ",
  "text_data": "Age is 71.6 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 14.0. 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) are 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**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:21:37.525590"
}