{
  "ptid_time": "032_S_0479_2008-05-29",
  "img_path": "/data/qiuhui/data/adni/images/032_S_0479/2008-05-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 35,879 mm³, 27.8% above the reference mean. With a Z-score of 0.64 (73.8th percentile), this represents normal volume ; hippocampal volume measures 7,478 mm³, 5.1% above the reference mean. With a Z-score of 0.47 (68.0th percentile), this represents normal volume ; whole brain volume measures 1,053,580 mm³, 8.1% above the reference mean. With a Z-score of 1.02 (84.6th percentile), this represents mild enlargement; entorhinal cortex volume measures 2,795 mm³, 23.9% below the reference mean. With a Z-score of -1.47 (7.1th percentile), this represents mild atrophy; fusiform gyrus volume measures 14,901 mm³, 12.4% below the reference mean. With a Z-score of -1.13 (12.9th percentile), this represents mild atrophy; middle temporal gyrus volume measures 21,344 mm³, 11.3% above the reference mean. With a Z-score of 0.98 (83.8th percentile), this represents normal volume . ",
  "text_data": "Age is 75.5 years. Gender is Female. Education: 20 years. MMSE: 29.0. Logical Memory: 17.0. Laboratory findings: Total Protein: 7.90 (significant elevated). APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The entorhinal cortex and fusiform gyrus show mild atrophy (Z-scores -1.47 and -1.13, respectively), which are early markers of Alzheimer's pathology. However, hippocampal and whole brain volumes are normal or slightly enlarged, and MMSE is intact (29/30). No APOE4 risk allele is present.  \n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Atrophy in AD-vulnerable regions raises suspicion, but preserved cognition and normal hippocampal volume suggest no current impairment.)",
  "timestamp": "2025-07-26T04:55:30.264717"
}