Motion compensation in MRI using variable density spiral trajectories.
Published: 2004
Language: eng
Number of pages: 86
Description: A novel technique is presented to compensate for motion artefacts in magnetic resonance imaging (MRI) using a variable density spiral (VDS) trajectory. In this thesis, a technique is shown to register each of the VDS interleaves prior to reconstruction.The technique is demonstrated in motion phantoms as well as human volunteers. Evaluation of the registration accuracy of the technique shows good agreement with an external monitoring device. Furthermore, it is shown that motion artefacts can be significantly reduced when compared to VDS trajectory acquisitions without compensation. An evaluation of the trajectory parameters is also presented and an optimal trajectory for compensating for respiratory motion is proposed.
Notes: Adviser: Donald B. Plewes.

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

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

Source: Masters Abstracts International, Volume: 42-06, page: 2129.

MICR copy on microfiche (1 microfiche).