{
  "ptid_time": "033_S_0514_2010-06-09",
  "img_path": "/data/qiuhui/data/adni/images/033_S_0514/2010-06-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 127,362 mm³, 170.9% above the reference mean. With a Z-score of 4.96 (100.0th percentile), this represents profound enlargement; whole brain volume measures 1,157,010 mm³, 12.4% above the reference mean. With a Z-score of 1.63 (94.8th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 84.7 years. Gender is Male. Education: 20 years. MMSE: 29.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 653.60 pg/mL (normal ); Total tau: 122.90 pg/mL (mild reduced); Phosphorylated tau: 9.80 pg/mL (moderate reduced). ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is significantly enlarged (170.9% above reference, Z-score 4.96), suggesting substantial atrophy, while whole brain volume is moderately enlarged (12.4% above reference). Despite this, cognitive performance (MMSE 29) is intact, and biomarkers (normal Aβ, reduced T-tau and P-tau) do not support Alzheimer’s pathology.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (structural changes are severe but not matched by cognitive or biomarker evidence of neurodegeneration)",
  "timestamp": "2025-07-26T05:12:26.292266"
}