{
  "ptid_time": "031_S_4218_2013-09-18",
  "img_path": "/data/qiuhui/data/adni/images/031_S_4218/2013-09-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 70,244 mm³, 49.4% above the reference mean. With a Z-score of 1.43 (92.4th percentile), this represents mild enlargement; hippocampal volume measures 7,548 mm³, 8.3% above the reference mean. With a Z-score of 0.72 (76.4th percentile), this represents normal volume ; whole brain volume measures 1,074,290 mm³, 4.4% above the reference mean. With a Z-score of 0.57 (71.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,108 mm³, 3.5% above the reference mean. With a Z-score of 0.23 (59.1th percentile), this represents normal volume ; fusiform gyrus volume measures 21,184 mm³, 17.3% above the reference mean. With a Z-score of 1.49 (93.2th percentile), this represents mild enlargement; middle temporal gyrus volume measures 21,637 mm³, 7.3% above the reference mean. With a Z-score of 0.65 (74.3th percentile), this represents normal volume . ",
  "text_data": "Age is 82.7 years. Gender is Male. Education: 16 years. MMSE: 29.0. MoCA: 26.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.99 SUVR (normal ); Total tau: 316.50 pg/mL (normal ); Phosphorylated tau: 27.60 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The brain volume data shows mild ventricular enlargement but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, middle temporal gyrus). Cognitive scores (MMSE 29, MoCA 26) are within normal limits for age, and biomarkers (T-tau, P-tau, AV45) are normal. APOE4-negative status further reduces Alzheimer's risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: High",
  "timestamp": "2025-07-26T04:48:47.367319"
}