Results 251 to 260 of about 349,011 (299)
Some of the next articles are maybe not open access.
Electrical Impedance Tomography
SIAM Review, 1999A mathematical model for electrical impedance tomography is described. This model is used for explaining the Rensselaer system. Some reconstruction algorithms are surveyed, especially the Moser algorithm. Some experimental tests are given.
David Isaacson
exaly +2 more sources
Electrical Impedance Tomography
Current Opinion in Critical Care, 2009Electrical impedance tomography (EIT) is a noninvasive, radiation-free monitoring tool that allows real-time imaging of ventilation. The purpose of this article is to discuss the fundamentals of EIT and to review the use of EIT in critical care patients.In addition to its established role in describing the distribution of alveolar ventilation, EIT has ...
Eduardo L V, Costa +2 more
openaire +2 more sources
Electrical impedance tomography
IEEE Signal Processing Magazine, 2001Electrical impedance tomography (EIT) is an imaging modality that estimates the electrical properties at the interior of an object from measurements made on its surface. Typically, currents are injected into the object through electrodes placed on its surface, and the resulting electrode voltages are measured.
Gary J. Saulnier +4 more
openaire +1 more source
Electrical impedance endotomography
Physics in Medicine and Biology, 2002In electrical impedance endotomography (EIE), the impedance measuring electrodes are placed at the centre of the region of interest instead of encircling it, as in usual electrical impedance tomography. EIE has been developed for prostate imaging. The developed mathematical model enables the derivation of analytical equations for electric potential ...
Jacques, Jossinet +2 more
openaire +2 more sources
Imaging the complex impedance in electrical impedance tomography
Clinical Physics and Physiological Measurement, 1992Measuring the reactive component of the bio-impedance enables a full characterisation of the frequency response of a tissue. The amplitude of the reactive component is relatively small in the frequency range generally used in electrical impedance tomography (EIT). Its measurement is therefore more sensitive to errors.
J, Jossinet, C, Trillaud
openaire +2 more sources
Electrical impedance of the pituitary gland
Journal of Neurosurgery, 1970✓ Experimental and clinical measurements of electrical impedance revealed a significant well-delineated difference between the pars distalis and the pars nervosa, providing an accurate and easy means of identifying the tissue interface between these two elements of the pituitary gland.
N T, Zervas, A, Shintani, K S, Pickren
openaire +2 more sources
Electrical impedance tomography
Current Opinion in Critical Care, 2012Electrical impedance tomography (EIT) is a useful noninvasive tool for monitoring ventilation finding its way into the clinical setting. The focus of this review is to discuss the balance between the potential for EIT as a clinical monitor accepting a level of uncertainty and the scientific demand for absolute perfection.The controversy concerning ...
Stefan, Lundin, Ola, Stenqvist
+6 more sources
Multifrequency electrical impedance tomography
Clinical Physics and Physiological Measurement, 1992Multifrequency tomography may be conveniently achieved by sequentially sweeping the probing drive current and measuring the resultant voltages at each frequency. If events change during measurement comparisons between frequencies cannot be made. Mixing several frequency components may decrease acquisition time but increase the complexity of the ...
P M, Record, R, Gadd, F, Vinther
openaire +2 more sources
An electrical impedance tomography microscope
Physiological Measurement, 1996A circular array of 16 electrodes has been constructed for use as an electrical impedance tomography (EIT) microscope. The electrodes were made from 60 microns diameter gold wires anchored to a printed circuit board. The internal diameter of the array was 0.9 mm giving a theoretical spatial resolution of about 100 microns.
H, Griffiths +3 more
openaire +2 more sources