{
  "ptid_time": "041_S_4874_2012-08-02",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4874/2012-08-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,069 mm³, 19.1% below the reference mean. With a Z-score of -0.55 (29.2th percentile), this represents normal volume ; hippocampal volume measures 8,131 mm³, 4.1% above the reference mean. With a Z-score of 0.58 (71.8th percentile), this represents normal volume ; whole brain volume measures 1,056,140 mm³, 1.5% above the reference mean. With a Z-score of 0.18 (57.1th percentile), this represents normal volume . ",
  "text_data": "Age is 57.7 years. Gender is Female. Education: 18 years. Handedness: Left. Race: White. Medical history: Psychiatric; Head, Eyes, Ears, Nose and Throat; Dermatologic-Connective Tissue; Musculoskeletal; Renal-Genitourinary; Major Surgical Procedures. MMSE: 29.0. MoCA: 29.0. Logical Memory: 9.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.00 SUVR (normal ); Amyloid beta: 1650.00 pg/mL (moderate elevated); Total tau: 229.50 pg/mL (normal ); Phosphorylated tau: 19.01 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The brain volumes (ventricular, hippocampal, and whole brain) are within normal ranges, and cognitive scores (MMSE and MoCA) are high, indicating no significant cognitive impairment. However, moderate elevation in Aβ suggests early amyloid pathology, but normal tau and AV45 levels do not yet support a neurodegenerative diagnosis.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to elevated Aβ but otherwise normal biomarkers and cognitive performance)",
  "timestamp": "2025-07-26T07:20:10.709275"
}