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Figure 5 DEMRI Short-Axis Views

(A) Short-axis magnetic resonance imaging with delayed enhancement (DEMRI) of an anterior papillary muscle (PAP) with heterogeneous contrast uptake. The thin white arrow indicates the portion of the PAP head with contrast uptake, and the black arrow indicates the portion devoid of delayed enhancement. The posterior PAP shows homogeneous contrast uptake (thick white arrow). The heterogeneity index of the anterior PAP was 0.93, compared with 0 for the posterior PAP. (B) Short-axis DEMRI of PAPs without up-take of gadolinium.