Open AccessFast B1 field localisation in high‐field MRI systems
Author(s) -
Yoo H.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2013.1335
Subject(s) - electromagnetic coil , radio frequency , radiofrequency coil , magnetic field , magnetic resonance imaging , field (mathematics) , nuclear magnetic resonance , physics , acoustics , materials science , electronic engineering , computer science , engineering , electrical engineering , mathematics , telecommunications , medicine , radiology , quantum mechanics , pure mathematics
In high‐magnetic magnetic resonance imaging (MRI) systems (7 T and above), the radio frequency (RF) field shows greater inhomogeneity compared with clinical MRI systems (1.5 and 3.0 T). In multi‐channel RF coils, driving each coil element with convex optimisation can reduce non‐uniformity of the RF field in a region of interest. In this Letter, a periodic compressed method (PCM) and a PCM after averaging are proposed in order to reduce RF coil control time at high fields. Simulation results were obtained using a human head model in 7 and 9.4 T systems, and the results are discussed in detail.