{
  "ptid_time": "031_S_4496_2014-02-20",
  "img_path": "/data/qiuhui/data/adni/images/031_S_4496/2014-02-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 46,197 mm³, 64.6% above the reference mean. With a Z-score of 1.48 (93.0th percentile), this represents mild enlargement; hippocampal volume measures 7,661 mm³, 7.7% above the reference mean. With a Z-score of 0.70 (75.9th percentile), this represents normal volume ; whole brain volume measures 980,852 mm³, 0.6% above the reference mean. With a Z-score of 0.08 (53.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,456 mm³, 5.9% below the reference mean. With a Z-score of -0.36 (35.8th percentile), this represents normal volume ; fusiform gyrus volume measures 17,425 mm³, 2.4% above the reference mean. With a Z-score of 0.22 (58.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,892 mm³, 1.4% below the reference mean. With a Z-score of -0.13 (45.0th percentile), this represents normal volume . ",
  "text_data": "Age is 78.1 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 19.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.02 SUVR (normal ); Total tau: 237.40 pg/mL (normal ); Phosphorylated tau: 21.86 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild ventricular enlargement but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 30, MoCA 29) are intact, and biomarkers (T-tau, P-tau, AV45) are normal. The APOE4 carrier status is a risk factor but not diagnostic.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T04:50:11.815741"
}