Abstract #3169

Wideband Adiabatic Inversion with a Hyperbolic Secant 4 (HS4) Pulse for Late Gadolinium Enhancement MRI of Patients with Implanted Cardiac Devices

Shams Rashid¹, Jiaxin Shao¹, and Peng Hu^1,2

¹Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, United States, ²Biomedical Physics Inter-Departmental Graduate Program, University of California, Los Angeles, Los Angeles, CA, United States

We present a wideband inversion pulse of 8kHz bandwidth designed with a hyperbolic secant 4 (HS4) adiabatic inversion pulse, for use in wideband late gadolinium enhancement (LGE) MRI in patients with implantable cardioverter-defibrillators (ICDs). This HS4 wideband pulse has more than twice the bandwidth of the previously reported wideband hyperbolic secant (HS) adiabatic inversion pulse for wideband LGE. We demonstrate that the wideband HS4 pulse is superior to the wideband HS pulse in eliminating hyperintensity artifacts resulting from off-resonance induced by an ICD in the myocardium.

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