Validation of magnetic resonance imaging of ultrasound fields.
Published: 2004
Language: eng
Number of pages: 73
Description: Ultrasonic imaging is commonly used in medical diagnostic and therapeutic applications. The ability of ultrasound to achieve these tasks is determined by the acoustic field generated within the target object necessitating an understanding of the interaction of ultrasound with tissue.The purpose of this thesis is to validate the MR pressure measurements against conventional hydrophone measurements of ultrasonic pressure. Good agreement was found between the MR and hydrophone values. The verification of the quantitative nature of the MR technique enables its use in investigations of other ultrasound phenomena.A novel magnetic resonance (MR) imaging method has recently been described that allows non-invasive, quantitative mapping of medical ultrasound fields in tissue. A strong magnetic field gradient resonant with the applied ultrasound frequency is required to detect the motions associated with the ultrasound. A direct measurement of absolute pressure of the ultrasound wave can theoretically be obtained from the measured displacements.
Notes: Adviser:  Don B. Plewes.

Thesis (M.Sc.)--University of Toronto, 2004.

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

Source: Masters Abstracts International, Volume: 43-03, page: 0796.

MICR copy on microfiche (1 microfiche).