{
  "ptid_time": "041_S_6192_2020-02-07",
  "img_path": "/data/qiuhui/data/adni/images/041_S_6192/2020-02-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 54,263 mm³, 46.8% above the reference mean. With a Z-score of 1.26 (89.7th percentile), this represents mild enlargement; hippocampal volume measures 6,181 mm³, 4.8% below the reference mean. With a Z-score of -0.39 (34.9th percentile), this represents normal volume ; whole brain volume measures 893,263 mm³, 3.8% below the reference mean. With a Z-score of -0.45 (32.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,622 mm³, 4.6% above the reference mean. With a Z-score of 0.25 (59.8th percentile), this represents normal volume ; fusiform gyrus volume measures 15,258 mm³, 5.3% below the reference mean. With a Z-score of -0.40 (34.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,272 mm³, 4.2% below the reference mean. With a Z-score of -0.37 (35.4th percentile), this represents normal volume . ",
  "text_data": "Age is 85.3 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 1.10 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (Z-score 1.26), but all other brain volumes (hippocampus, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges (Z-scores close to 0). Cognitive scores (MMSE 30, MoCA 28) are intact, and there is no APOE4 risk allele.  \n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **High**  \n\n(No significant structural atrophy or cognitive impairment is present, and the mild ventricular enlargement alone is insufficient for MCI/dementia diagnosis in the context of normal cognition.)",
  "timestamp": "2025-07-26T07:29:11.760554"
}