Single-loop endoluminal RF-coils are a possible solution for the SNR limitations of external coils. However, they suffer from signal variations due to the coil sensitivity dependence with the coil orientations with respect to the B0 field. We simulated (electromagnetic simulations with Feko) an RF-coil along the Ox axis (0°) taken to be that of the B0 field and for specific coil orientations (30, 45, 60 and 90°) around and in oblique position with respect to the Ox axis (B0). We then evaluated the signal distribution (H-field 2D map) variation with the coil orientations to can propose an adequate architecture.
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