{
  "ptid_time": "136_S_0196_2006-04-17",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0196/2006-04-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,907 mm³, 10.1% above the reference mean. With a Z-score of 0.23 (59.2th percentile), this represents normal volume ; whole brain volume measures 936,561 mm³, 3.9% below the reference mean. With a Z-score of -0.49 (31.1th percentile), this represents normal volume . ",
  "text_data": "Age is 78.0 years. Gender is Female. Education: 18 years. Handedness: Right. Race: White. Medical history: Psychiatric; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Musculoskeletal; Endocrine-Metabolic; Gastrointestinal; Allergies or Drug Sensitivities; Smoking; Malignancy; Major Surgical Procedures. MMSE: 29.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 540.60 pg/mL (mild reduced); Total tau: 164.10 pg/mL (normal ); Phosphorylated tau: 16.32 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is slightly above the reference mean but still within normal range (Z-score 0.23), while whole brain volume is slightly below the reference mean but also normal (Z-score -0.49). MMSE is high (29/30), APOE4 is negative, and CSF biomarkers show only mild Aβ reduction with normal tau levels, suggesting no significant neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T15:59:38.799454"
}