{
  "ptid_time": "141_S_4160_2013-10-31",
  "img_path": "/data/qiuhui/data/adni/images/141_S_4160/2013-10-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 72,029 mm³, 87.0% above the reference mean. With a Z-score of 2.08 (98.1th percentile), this represents significant enlargement; hippocampal volume measures 6,575 mm³, 13.0% below the reference mean. With a Z-score of -1.27 (10.2th percentile), this represents mild atrophy; whole brain volume measures 1,096,820 mm³, 1.6% above the reference mean. With a Z-score of 0.21 (58.3th percentile), this represents normal volume . ",
  "text_data": "Age is 76.1 years. Gender is Male. Education: 12 years. MMSE: 29.0. MoCA: 21.0. Logical Memory: 3.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.96 SUVR (normal ); Amyloid beta: 1219.00 pg/mL (normal ); Total tau: 131.80 pg/mL (mild reduced); Phosphorylated tau: 11.40 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The patient shows significant ventricular enlargement (indicative of brain atrophy) and mild hippocampal atrophy, which are structural changes often seen in neurodegenerative conditions. Despite normal Aβ levels and reduced tau markers, the cognitive scores (MMSE 29, MoCA 21) suggest possible mild cognitive impairment (MCI), given the discrepancy between the high MMSE and lower MoCA.  \n\n**Diagnosis:** **MCI**  \n**Confidence:** **Medium** (due to conflicting biomarkers—normal Aβ but structural atrophy—and cognitive test discrepancies)",
  "timestamp": "2025-07-26T17:02:22.358355"
}