{
  "ptid_time": "007_S_0068_2007-12-12",
  "img_path": "/data/qiuhui/data/adni/images/007_S_0068/2007-12-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,750 mm³, 6.0% above the reference mean. With a Z-score of 0.14 (55.5th percentile), this represents normal volume ; hippocampal volume measures 7,438 mm³, 4.5% above the reference mean. With a Z-score of 0.42 (66.2th percentile), this represents normal volume ; whole brain volume measures 927,718 mm³, 4.8% below the reference mean. With a Z-score of -0.61 (27.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,593 mm³, 2.2% below the reference mean. With a Z-score of -0.13 (44.7th percentile), this represents normal volume ; fusiform gyrus volume measures 16,040 mm³, 5.7% below the reference mean. With a Z-score of -0.52 (30.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,481 mm³, 17.3% above the reference mean. With a Z-score of 1.50 (93.3th percentile), this represents mild enlargement. ",
  "text_data": "Age is 76.4 years. Gender is Female. Education: 12 years. MMSE: 29.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus) fall within normal ranges based on Z-scores and percentiles, except for the middle temporal gyrus, which shows mild enlargement. The MMSE score of 29/30 is within the normal range, and the absence of APOE4 alleles reduces genetic risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:44:12.135582"
}