Journal ArticleDOI
A measurement system and image reconstruction in magnetic induction tomography
TLDR
A 16-channel MIT measurement system that is capable of parallel readout of 16 receiver channels and of low conductivity applications, conductivity less than 5 S m(-1), and a frequency of 10 MHz is introduced.Abstract:
Magnetic induction tomography (MIT) is a technique for imaging the internal conductivity distribution of an object. In MIT current-carrying coils are used to induce eddy currents in the object and the induced voltages are sensed with other coils. From these measurements, the internal conductivity distribution of the object can be reconstructed. In this paper, we introduce a 16-channel MIT measurement system that is capable of parallel readout of 16 receiver channels. The parallel measurements are carried out using high-quality audio sampling devices. Furthermore, approaches for reconstructing MIT images developed for the 16-channel MIT system are introduced. We consider low conductivity applications, conductivity less than 5 S m−1, and we use a frequency of 10 MHz. In the image reconstruction, we use time-harmonic Maxwell's equation for the electric field. This equation is solved with the finite element method using edge elements and the images are reconstructed using a generalized Tikhonov regularization approach. Both difference and static image reconstruction approaches are considered. Results from simulations and real measurements collected with the Philips 16-channel MIT system are shown.read more
Citations
More filters
Magnetic Induction Tomography
Yuyan Xue,Min Han +1 more
TL;DR: This research investigates the image reconstruction problem using statistical classification method to enhance the resolution of magnetic induction tomography, and the applicability and effectiveness of the proposed method are shown by compared with some other well developed methods.
Journal ArticleDOI
Hardware and software design for a National Instrument-based magnetic induction tomography system for prospective biomedical applications
Hsin-Yu Wei,Manuchehr Soleimani +1 more
TL;DR: The reconstructed images of detecting the presence of saline solutions are included in this paper, which show the capability of national instrument products to be developed into a full-scaled biomedical MIT system, by demonstrating the practical experimental results.
Journal ArticleDOI
Forward modelling of magnetic induction tomography: a sensitivity study for detecting haemorrhagic cerebral stroke.
TL;DR: For a magnetic induction tomography (MIT) system operating at 10 MHz, the signals produced by a haemorrhagic cerebral stroke were computed using an anatomically realistic, multi-layer, finite element (FE) head model comprising 12 tissues.
Journal ArticleDOI
Screening and Biosensor-Based Approaches for Lung Cancer Detection
TL;DR: Biosensor-based techniques have been recently recommended as a rapid and cost-effective tool for early diagnosis of lung tumor markers
Journal ArticleDOI
A Method to Solve the Forward Problem in Magnetic Induction Tomography Based on the Weakly Coupled Field Approximation
TL;DR: The application of a weakly coupled approximation to the solution of the forward problem is investigated and the accuracy against the computation time and memory gained in adopting this approximation is examined.
References
More filters
Book
The Finite Element Method in Electromagnetics
TL;DR: The Finite Element Method in Electromagnetics, Third Edition as discussed by the authors is a leading textbook on the finite element method, incorporating major advancements and further applications in the field of electromagnetic engineering.
Journal ArticleDOI
Edge element formulations of eddy current problems
TL;DR: In this paper, the vector potentials are approximated by edge finite elements and the scalar potentials by nodal ones, leading, in most cases, to singular finite element equations systems.
Journal ArticleDOI
Magnetic induction tomography: experimental realization
TL;DR: Experiments demonstrate that with proper selection of measurement conditions it is possible to use the phase shifts between inductor and detector signals for image reconstruction by filtered backprojection along magnetic lines.
Journal ArticleDOI
Electrodeless Measurements of the Effective Resistivity of the Human Torso and Head by Magnetic Induction
Peter P. Tarjan,Richard McFee +1 more
TL;DR: A magnetically coupled impedance measuring instrument has been developed for determining an effective electrical resistivity of human subjects without electrodes.
Journal ArticleDOI
Electrical conductivity imaging via contactless measurements: an experimental study
TL;DR: The field profiles obtained by scanning a biological tissue show the potential of this methodology for clinical applications, and images obtained from isolated conducting tubes show that it is possible to distinguish two tubes separated 17 mm from each other.