{
  "ptid_time": "029_S_0836_2007-10-01",
  "img_path": "/data/qiuhui/data/adni/images/029_S_0836/2007-10-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 72,760 mm³, 54.8% above the reference mean. With a Z-score of 1.59 (94.4th percentile), this represents moderate enlargement; hippocampal volume measures 5,869 mm³, 15.8% below the reference mean. With a Z-score of -1.36 (8.6th percentile), this represents mild atrophy; whole brain volume measures 1,059,430 mm³, 2.9% above the reference mean. With a Z-score of 0.39 (65.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,068 mm³, 22.7% below the reference mean. With a Z-score of -1.49 (6.9th percentile), this represents mild atrophy; fusiform gyrus volume measures 18,245 mm³, 1.0% above the reference mean. With a Z-score of 0.09 (53.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,660 mm³, 2.5% below the reference mean. With a Z-score of -0.23 (41.0th percentile), this represents normal volume . ",
  "text_data": "Age is 84.1 years. Gender is Male. Education: 16 years. MMSE: 26.0. Logical Memory: 6.0. APOEε4 alleles: 1.0. Biomarker levels: Amyloid beta: 668.70 pg/mL (normal ); Total tau: 309.30 pg/mL (normal ); Phosphorylated tau: 28.28 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "Reasoning: The patient shows moderate ventricular enlargement and mild hippocampal and entorhinal cortex atrophy, which are structural changes often associated with neurodegeneration. However, CSF biomarkers (Aβ, T-tau, P-tau) are normal, and cognitive performance (MMSE 26) is within the normal range for age, suggesting no significant functional impairment.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to conflicting structural and biomarker findings, but preserved cognition supports CN)",
  "timestamp": "2025-07-26T04:16:45.691310"
}