A fundamental problem in electromagnetics is the shaping of the field intensity distribution in a given region of interest. Several strategies have been designed to address such issue in several and different applications, ranging from hyperthermia to wireless power transfer. In this contribution, we focus our attention on Magnetic Resonance Imaging shimming. Usually the shimming (or leveling) of the radiofrequency field B1+ can be performed by using particular materials characterized by high permittivity values or by acting directly on the primary sources (i.e., the excitations of the radiofrequency coil). Herein, the proposed procedure exploits the field intensity shaping paradigm to design the primary sources in such a way to ensure a uniform field and to control the specific absorption rate inside the biological region under investigation.
Application of Field Intensity Shaping Paradigm in a Biological Scenario for MRI Shimming
Zumbo S.;Bevacqua M.;Battaglia G. M.;Isernia T.
2022-01-01
Abstract
A fundamental problem in electromagnetics is the shaping of the field intensity distribution in a given region of interest. Several strategies have been designed to address such issue in several and different applications, ranging from hyperthermia to wireless power transfer. In this contribution, we focus our attention on Magnetic Resonance Imaging shimming. Usually the shimming (or leveling) of the radiofrequency field B1+ can be performed by using particular materials characterized by high permittivity values or by acting directly on the primary sources (i.e., the excitations of the radiofrequency coil). Herein, the proposed procedure exploits the field intensity shaping paradigm to design the primary sources in such a way to ensure a uniform field and to control the specific absorption rate inside the biological region under investigation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
