Biological applications of current density imaging.
Published: 2004
Language: eng
Number of pages: 103
Description: Current density imaging (CDI), based on magnetic resonance imaging technology, enables a non-invasive measurement of current density vectors inside a conductive sample. This thesis explores the biological applications of two forms of CDI, the radio frequency current density imaging (RFCDI) and the low frequency current density imaging (LFCDI). The conductivity weighted current density measurements in rodent cortex during spreading depression examined the suitability of using RFCDI to measure the activity related changes in tissue conductivity. Furthermore, a direct measurement of current flow inside the pig torso using defibrillation electrodes was made. This study demonstrated LFCDI technique's ability to measure the current flow in a highly heterogeneous and anisotropic tissue. Through these investigations, the capabilities and constraints of CDI techniques were identified and examined in detail. With careful planning, various forms of CDI allowed accurate measurements of current density vector in in-vivo and post-mortem  biological tissues.
Notes: Adviser:  Michael L. G. Joy.

Thesis (Ph.D.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Dissertation Abstracts International, Volume: 65-05, Section: B, page: 2565.