We present an analytical method for the analysis of Radio Frequency (RF) volume coils for Magnetic Resonance Imaging (MRI), using a 2-D full wave solution with loading by multilayered cylinders. This allows the characterization of radio-frequency E, H, B1, B1(+) fields. Comparisons are provided with experimental data obtained at 7.0 T. The procedure permits us to clearly separate the solution to single line source problem (which we call the primordial solution) and the composite solution (i.e. full coil, i.e. the summations of primordial solutions according to the resonator drive configuration). The capability of separating the primordial solution and the composite one is fundamental for a thorough analysis of the phenomena of dielectric resonance, and of standing wave and multi-source interference. We show that dielectric resonance can be identified only by looking at the electromagnetic field from a single line source.
|Autori:||G., Tiberi; M., Costagli; R., Stara; Cosottini, Mirco; J., Tropp; M., Tosetti|
|Titolo:||Electromagnetic characterization of an MR volume coil with multilayered cylindrical load using a 2-D analytical approach.|
|Anno del prodotto:||2013|
|Digital Object Identifier (DOI):||10.1016/j.jmr.2013.02.018|
|Appare nelle tipologie:||1.1 Articolo in rivista|