Magnetic Resonance Electrical Impedance Tomography (MREIT) at 11 Tesla Field Strength: Preliminary Experimental Study
نویسندگان
چکیده
We present a preliminary experimental study of electrical conductivity imaging using an 11T Magnetic Resonance Electrical Impedance Tomography (MREIT) system. The primary goal was to evaluate the noise level in measured magnetic flux density data subject to an injection current. We found that the noise level from the 11T system is about 0.2nT whereas it is about 1.4nT using a 3T system. MREIT conductivity images reconstructed using the magnetic flux density data from the 11T system are much clearer because of the reduced noise level. Our results suggest that the 11T MREIT system will capability to image small conductivity changes induced by spontaneous neural activity. Keywords—MREIT, conductivity image, magnetic flux density, noise level, neural activity
منابع مشابه
Magnetic resonance electrical impedance tomography at 3 Tesla field strength.
Magnetic resonance electrical impedance tomography (MREIT) is a recently developed imaging technique that combines MRI and electrical impedance tomography (EIT). In MREIT, cross-sectional electrical conductivity images are reconstructed from the internal magnetic field density data produced inside an electrically conducting object when an electrical current is injected into the object. In this ...
متن کاملElectrical conductivity imaging by magnetic resonance electrical impedance tomography (MREIT).
Magnetic resonance electrical impedance tomography (MREIT) is a recently developed imaging technique that combines MRI and electrical impedance tomography (EIT). In MREIT, cross-sectional electrical conductivity images are reconstructed from the internal magnetic field density data produced inside an electrically conducting subject when an electrical current is injected into the subject. In thi...
متن کاملNoise analysis in magnetic resonance electrical impedance tomography at 3 and 11 T field strengths.
In magnetic resonance electrical impedance tomography (MREIT), we measure the induced magnetic flux density inside an object subject to an externally injected current. This magnetic flux density is contaminated with noise, which ultimately limits the quality of reconstructed conductivity and current density images. By analysing and experimentally verifying the amount of noise in images gathered...
متن کاملMagnetic resonance electrical impedance tomography (MREIT): conductivity and current density imaging
This paper reviews the latest impedance imaging technique called Magnetic Resonance Electrical Impedance Tomography (MREIT) providing information on electrical conductivity and current density distributions inside an electrically conducting domain such as the human body. The motivation for this research is explained by discussing conductivity changes related with physiological and pathological ...
متن کاملA Matlab Toolbox for Magnetic Resonance Electrical Impedance Tomography (MREIT): MREIT Toolbox
Magnetic Resonance Electrical Impedance Tomography (MREIT) is a relatively new imaging technique that allows tomographic imaging of electrical conductivity of biologically conductive objects. In this paper, we present software that has been implemented to accompany MREIT. The software offers various computational tools from preprocessing of MREIT data to reconstruction of crosssectional conduct...
متن کامل