Anh Tu Van1, Barbara Cervantes2, Ernst J Rummeny2, Axel Haase1, and Dimitrios Karampinos2
1Zentralinstitut für Medizintechnik, Technische Universität München, Garching, Germany, 2Diagnostic and Interventional Radiology, Technische Universität München, Munich, Germany
Diffusion-preparation
is regaining popularity recently thanks to its compatibility with any type of
readout scheme. Using Bloch simulations, the current work provides
understanding of the motion-induced magnitude and phase modulation of the
signal obtained with diffusion-prepared sequences. When motion induces a
constant phase across the voxel, dephasing signal before tipping up and
rephasing it before readout should be used to remove motion-induced magnitude
modulation. When the induced phase is not constant, smaller voxel sizes assist
towards stabilizing both magnitude and phase of the signal. In vivo data using
diffusion-prepared 3D TSE are shown supporting the observations of the Bloch
simulations.
