Beckham, Wayne Allan, 1963-2006-12-282006-12-2819971997http://hdl.handle.net/2440/19007Bibliography: leaves 148-155.xiv, 210 leaves : ill. (some col.) ; 30 cm.This thesis provides several methods for assessment of total machine dependent distortion which allows the clinical significance of that distortion to be established. A method for removal of machine dependent distortions is also presented and shown to work for a locally produced, large field of view spatial linearity phantom. Finally, a possible method is developed which is suitable for application of the distortion correction method to actual patients.73273 bytesapplication/pdfenMagnetic resonance imaging.Nervous system Surgery.Radiotherapy.Medical physics.Thesis