T2 mapping for contiguous multi-slice 3D volume: A new EMC-based technique taking into account slice cross-talk effects
Ekaterina A Brui1, Charles A de Mayenne 2, Stanislas Rapacchi 3, Thomas Troalen 4, Christophe Vilmen3, and David Bendahan1,3
1School of Physics and Engineering, ITMO University, Saint-Petersburg, Russian Federation, 2National Higher French Institute of Aeronautics and Space, Toulouse, France, 3Aix-Marseille Universite, CNRS, Centre de Résonance Magnétique Biologique et Médicale, Marseille, France, 4Siemens Healthcare SAS, Saint-Denis, France
Previously, an elegant method based on the generation of echo modulation curves (EMC) demonstrated a very high accuracy of T2 measurements. However, the original approach considered EMC dictionary modelling only for a single slice mode of multi-echo spin echo (MESE) sequence. For some applications, such as T2 mapping of cartilage in small joints, contiguous MRI is required. As a result, slice cross-talk effect may affect the accuracy of T2 estimation. In this work, we report a modified version of the EMC technique, which can be used to quantify T2 values for zero-gap multi-slice MESE acquisitions in tissues with long T1.
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