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Abstract #1311

Improved Fat Signal Suppression for Coronary MRA at 3T Using a Water-Selective Adiabatic T2-Prep Technique

Andrew J. Coristine1, 2, Ruud B. van Heeswijk, 23, Matthias Stuber, 23

1CIBM-CVMR, Centre Hospitalier Universitaire Vaudois , Lausanne, VD, Switzerland; 2FBM, Universit de Lausanne, Lausanne, VD, Switzerland; 3CIBM-CVMR, Centre Hospitalier Universitaire Vaudois, Lausanne, VD, Switzerland

At high field, B0 and B1 inhomogeneities may complicate fat saturation strategies, such as CHEmically Selective Saturation (CHESS) pulses, which are dependant on precise excitation angles and precessional frequencies. These fat saturation pulses, which are necessary for unambiguous visualization of cardiac anatomy, are often used in conjunction with magnetization preparation modules, such as T2 Preparation (or T2-Prep), to improve blood/myocardium contrast. By modifying an adiabatic T2-Prep to be water-selective, off-resonance frequencies can be suppressed - adding an intrinsic fat signal attenuation that is less sensitive to B0 and B1 inhomogeneities - while preserving the T2-Prep's added contrast. Numerical simulations, phantom validation, and initial in vivo results are presented.

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Keywords

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