To evaluate the possibility of replacing conventional DCE MRI with UF-DCE MRI, we assessed the concordance of morphological information of the mass lesions between UF-DCE MRI and the early phase of DCE MRI. The size and shape showed excellent concordance between the two phases, while UF-DCE MRI tended to show circumscribed margin and homogeneous enhancement. In a sub-analysis, luminal subtypes demonstrated smaller size with homogeneous enhancement pattern compared with non-luminal subtypes. Predictive model for luminal subtype using the two parameters resulted in the AUC of 0.68, 0.72, for UF-DCE MRI and the early phase of DCE MRI, respectively (p=0.23).
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