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- Title
Implications of tissue magnetic susceptibility-related distortion on the rotating magnet in an MR-linac design.
- Authors
Wachowicz, K; Stanescu, T; Thomas, S D; Fallone, B G
- Abstract
One of the recently published concepts that combine the soft-tissue imaging capabilities of MRI with external beam radiotherapy involves the rigid coupling of a linac with a rotating biplanar low-field MR imaging system. While such a system would prevent possible image distortion resulting from relative motion between the magnet and the linac, the rotation of the magnet around the patient can itself introduce possibilities for image distortion that need to be addressed. While there are straightforward techniques in the literature for correcting distortions from gradient nonlinearities and nonuniform magnetic fields during image reconstruction, the correction of distortions related to tissue magnetic susceptibility is more complex. This work investigates the extent of this latter distortion type under the regime of a rotating magnetic field.
- Publication
Medical physics, 2010, Vol 37, Issue 4, p1714
- ISSN
0094-2405
- Publication type
Journal Article
- DOI
10.1118/1.3355856