access icon free Fast B1 field localisation in high-field MRI systems

© The Institution of Engineering and Technology
Received 23/04/2013, Published
Errata or comment

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.

Inspec keywords: biomedical MRI; brain; optimisation; medical image processing; image coding; coils; data compression

Other keywords: human head model; fast B1 field localisation; region-of-interest; magnetic flux density 3.0 T; high-magnetic magnetic resonance imaging systems; convex optimisation; coil element; high-field MRI systems; periodic compressed method; magnetic flux density 1.5 T to 9.4 T; clinical MRI systems; multichannel RF coils; radiofrequency field

Subjects: Medical magnetic resonance imaging and spectroscopy; Optimisation techniques; Patient diagnostic methods and instrumentation; Optimisation techniques; Biophysics of neurophysiological processes; Biomedical magnetic resonance imaging and spectroscopy; Image and video coding; Biology and medical computing; Computer vision and image processing techniques; Codes

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