{
  "ptid_time": "099_S_0534_2009-06-16",
  "img_path": "/data/qiuhui/data/adni/images/099_S_0534/2009-06-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 48,615 mm³, 61.9% above the reference mean. With a Z-score of 1.47 (92.9th percentile), this represents mild enlargement; hippocampal volume measures 8,628 mm³, 7.5% above the reference mean. With a Z-score of 0.75 (77.3th percentile), this represents normal volume ; whole brain volume measures 1,166,300 mm³, 2.8% above the reference mean. With a Z-score of 0.40 (65.4th percentile), this represents normal volume ; entorhinal cortex volume measures 5,078 mm³, 19.1% above the reference mean. With a Z-score of 1.32 (90.7th percentile), this represents mild enlargement; fusiform gyrus volume measures 18,545 mm³, 6.9% below the reference mean. With a Z-score of -0.57 (28.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 26,264 mm³, 17.2% above the reference mean. With a Z-score of 1.42 (92.2th percentile), this represents mild enlargement. ",
  "text_data": "Age is 65.8 years. Gender is Male. Education: 18 years. MMSE: 29.0. Logical Memory: 17.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (Z-score 1.47), which can be associated with atrophy, but hippocampal, whole brain, and fusiform gyrus volumes are within normal ranges. The MMSE score of 29 is intact, and there are no clear cognitive deficits reported. The APOE4 allele (heterozygous) increases Alzheimer's risk but does not confirm pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (ventricular enlargement raises some concern, but other markers and cognitive performance suggest normal aging)",
  "timestamp": "2025-07-26T10:58:08.642047"
}