Although R1 may not be significant, the statement in the patients examinations section in the results “R2 was significantly higher in the intraoperative compared to preoperative examinations, both with and without contrast agent” seems confusing, since Gadolinium is an R1 contrast agent and generally has less impact on R2.
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Intraoperative 3D quantitative magnetic resonance imaging in paediatric brain tumour surgery.
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