Abstract #0083
TrueCISS: Genuine bSSFP Signal Reconstruction from Undersampled Multiple-Acquisition SSFP Using Model-Based Iterative Non-Linear Inversion
Tom Hilbert 1,2 , Damien Nguyen 3 , Tobias Kober 1,2 , Jean-Philippe Thiran 2 , Gunnar Krueger 1,2 , and Oliver Bieri 3
1
Siemens ACIT CHUV Radiology, Siemens
Healthcare IM BM PI & Department of Radiology CHUV,
Lausanne, Switzerland,
2
LTS5,
cole Polytechnique Fdrale de Lausanne, Lausanne,
Switzerland,
3
Radiological
Physics, Department of Radiology, University of Basel,
Basel, Switzerland
Balanced steady-state free-precession (bSSFP) is prone
to local field inhomogeneities, typically appearing as
signal voids, i.e. banding-artifacts. A new method,
termed true constructive interference in steady state
(trueCISS), is proposed based on the acquisition of
eight highly undersampled bSSFP k-spaces with different
radio-frequency (RF) phase increments. A model-based
non-linear inversion is used to fit the bSSFP signal
model onto the undersampled data, effectively estimating
parameter maps that allow synthesizing the genuine bSSFP
signal over the whole image, thus without any noticeable
banding artifacts.
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