{
  "ptid_time": "041_S_0125_2008-01-30",
  "img_path": "/data/qiuhui/data/adni/images/041_S_0125/2008-01-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 62,788 mm³, 63.0% above the reference mean. With a Z-score of 1.51 (93.4th percentile), this represents moderate enlargement; hippocampal volume measures 9,130 mm³, 20.8% above the reference mean. With a Z-score of 2.03 (97.9th percentile), this represents significant enlargement; whole brain volume measures 1,194,310 mm³, 10.6% above the reference mean. With a Z-score of 1.38 (91.6th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,993 mm³, 21.8% above the reference mean. With a Z-score of 1.48 (93.0th percentile), this represents mild enlargement; fusiform gyrus volume measures 19,207 mm³, 2.0% above the reference mean. With a Z-score of 0.17 (56.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 25,615 mm³, 20.0% above the reference mean. With a Z-score of 1.80 (96.4th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 75.7 years. Gender is Male. Education: 18 years. MMSE: 30.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows enlargement in multiple regions (ventricular, hippocampal, whole brain, entorhinal cortex, middle temporal gyrus) rather than atrophy, which is atypical for Alzheimer’s disease. The MMSE score of 30 is normal, and the absence of APOE4 further reduces Alzheimer’s risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T06:55:53.411362"
}