{
  "ptid_time": "037_S_4308_2017-08-24",
  "img_path": "/data/qiuhui/data/adni/images/037_S_4308/2017-08-24/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 74,123 mm³, 92.4% above the reference mean. With a Z-score of 2.21 (98.7th percentile), this represents significant enlargement; hippocampal volume measures 7,198 mm³, 4.8% below the reference mean. With a Z-score of -0.47 (32.1th percentile), this represents normal volume ; whole brain volume measures 1,059,920 mm³, 1.8% below the reference mean. With a Z-score of -0.23 (40.7th percentile), this represents normal volume ; entorhinal cortex volume measures 5,538 mm³, 35.1% above the reference mean. With a Z-score of 2.38 (99.1th percentile), this represents significant enlargement; fusiform gyrus volume measures 22,220 mm³, 18.0% above the reference mean. With a Z-score of 1.53 (93.7th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 20,765 mm³, 2.7% below the reference mean. With a Z-score of -0.24 (40.4th percentile), this represents normal volume . ",
  "text_data": "Age is 79.5 years. Gender is Male. Education: 16 years. MMSE: 28.0. MoCA: 24.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.02 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant ventricular enlargement (a marker of brain atrophy) and notable enlargement in the entorhinal cortex and fusiform gyrus, which may suggest neurodegenerative changes. However, hippocampal volume is normal, and cognitive scores (MMSE 28, MoCA 24) are near-normal for age, with no APOE4 risk allele or abnormal amyloid (AV45).  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Structural changes suggest neurodegeneration, but cognitive performance is relatively preserved, and biomarker data does not strongly support Alzheimer’s pathology.)",
  "timestamp": "2025-07-26T06:45:07.908233"
}