{
  "ptid_time": "036_S_0576_2006-06-01",
  "img_path": "/data/qiuhui/data/adni/images/036_S_0576/2006-06-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,873 mm³, 14.7% below the reference mean. With a Z-score of -0.35 (36.3th percentile), this represents normal volume ; hippocampal volume measures 7,732 mm³, 2.3% above the reference mean. With a Z-score of 0.22 (58.8th percentile), this represents normal volume ; whole brain volume measures 1,111,310 mm³, 3.0% above the reference mean. With a Z-score of 0.38 (64.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,883 mm³, 5.3% below the reference mean. With a Z-score of -0.36 (35.9th percentile), this represents normal volume ; fusiform gyrus volume measures 21,729 mm³, 15.3% above the reference mean. With a Z-score of 1.31 (90.4th percentile), this represents mild enlargement; middle temporal gyrus volume measures 24,148 mm³, 13.2% above the reference mean. With a Z-score of 1.18 (88.2th percentile), this represents mild enlargement. ",
  "text_data": "Age is 77.5 years. Gender is Male. Education: 14 years. Handedness: Right. Race: White. Medical history: Cardiovascular; Gastrointestinal. MMSE: 28.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex) are within normal ranges (Z-scores close to 0, percentiles near 50th). The fusiform gyrus and middle temporal gyrus show mild enlargement but are not indicative of neurodegeneration. The MMSE score of 28 is within the normal range, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T06:01:03.048796"
}