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Abstract #0625

Enhancing fluid signal in driven-equilibrium short-tau inversion-recovery (STIR) imaging with short TR times.

Constantin von Deuster1,2 and Daniel Nanz2,3
1Advanced Clinical Imaging Technology, Siemens Healthineers International AG, Zurich, Switzerland, 2Swiss Center for Musculoskeletal Imaging, Balgrist Campus AG, Zurich, Switzerland, 3University of Zurich, Zurich, Switzerland

Synopsis

Keywords: MSK, Contrast Mechanisms, Driven EquilibriumFluid-sensitive Turbo-Spin-Echo (TSE) imaging in combination with Short-Tau Inversion Recovery for fat suppression (STIR) is commonly employed in musculoskeletal MRI. A Driven Equilibrium (DE) module following the imaging train can be used to reduce the Repetition Time (TR) without significant SNR loss. However, due to the STIR preparation, a conventional DE element rotates the fluid magnetization onto the negative z-axis instead of the positive z-axis, which delays longitudinal relaxation and attenuates the fluid signal. We implemented a modified DE module that increased fluid-signal intensity in STIR-TSE images of the spine.

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