Current patterns for electrical impedance tomography

Details Current patterns for electrical impedance tomography Current patterns for electrical impedance tomography

1991-07-23

1995-01-10

Hayes, Gail O.

Boots, shoes, and leggings

128734, A61B 505

Patent

active

053813332

ABSTRACT:
A method in electrical impedance tomography uses an adaptive repeated series of calculations and measurements to determine the best current pattern for a body having an initially unknown internal conductivity, for producing the best electrical impedance image for the body. Initially, an arbitrary current pattern and conductivity is utilized to generate a voltage pattern which is measured and compared with the theoretical voltage pattern based on the arbitrary conductivity and current patterns. When both the current pattern and the conductivity yielded by the process closely match values derived by measurements, the voltage pattern is used to produce the image.

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patent: 4920490 (1990-04-01), Isaacson
Isaacson; "Distinguishability of Conductivities by Electric Current Computed Tomography"; IEEE Transactions on Medical Imaging, vol. MI-5, No. 2, Jun. 1986.
Isaacson et al.; "Effects of measurement precision and finite numbers of electrodes on linear impedance imaging algorithms", Rensselaer Polytechnic Inst.; SIAM Journal on Applied Mathematics vol. 51 No. 6 Dec. 1991 pp. 1705-1731; Dialog #03420603.
Gisser et al., "Current Topics in Impedance Imaging"; Clin Phys Physiol Meas vol. 8 Suppl A 1987, Com of the Eur Communities COMAC-BME Workshop on Electr Impedance Tomogr-Appl Potential Tomogr, Sheffield, Engl, Jul. 2-4 1986 pp. 39-46; 1987; Dialog #02293207.

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