Reduction of the RF Shielding Caused by a Vascular Stent Using a Pseudo-Adiabatic Excitation

Guillaume Gilbert¹, Gilles Beaudoin¹

The use of a pseudo-adiabatic excitation pulse is investigated as a way to reduce the radiofrequency shielding caused by a vascular stent and consequently improve the depiction of the vessel lumen inside the stent. Using measurements performed on a vascular phantom, the employment of a pseudo-adiabatic excitation pulse is shown to allow the same effective flip angle to be simultaneously obtained inside and outside the stent, therefore eliminating the radiofrequency shielding effect of the stent during excitation.