{
  "ptid_time": "082_S_4428_2012-04-17",
  "img_path": "/data/qiuhui/data/adni/images/082_S_4428/2012-04-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,903 mm³, 25.0% below the reference mean. With a Z-score of -0.60 (27.5th percentile), this represents normal volume ; whole brain volume measures 1,154,930 mm³, 7.0% above the reference mean. With a Z-score of 0.91 (81.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,882 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 22,568 mm³, 19.8% above the reference mean. With a Z-score of 1.69 (95.4th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 22,777 mm³, 6.7% above the reference mean. With a Z-score of 0.61 (72.8th percentile), this represents normal volume . ",
  "text_data": "Age is 73.1 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measures are largely within normal ranges, with only the fusiform gyrus showing moderate enlargement (Z-score 1.69, 95.4th percentile). Cognitive scores (MMSE 30, MoCA 28) are intact, and there is no APOE4 risk allele. No significant atrophy is present in Alzheimer’s-sensitive regions like the entorhinal cortex.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T10:07:27.727196"
}