期刊
NEURORADIOLOGY
卷 42, 期 2, 页码 85-91出版社
SPRINGER VERLAG
DOI: 10.1007/s002340050020
关键词
magnetic resonance imaging, diffusion-weighted artefacts navigator echo; cardiac gating
Diffusion-weighted MRI (DWI) is extremely sensitive to motion of the object being examined. Pulse triggering and navigator echo correction are methods for reducing motion artefacts which can be combined with conventional DWI sequences. Implementation of these methods in imaging sequences with a readout of one, three, or five echoes is presented and imaging results compared in a study of five healthy volunteers. As an objective measure for motion-induced image artefacts, the artefacticity of an image is defined. Pulse triggering and navigator echo correction significantly improve image quality and provide a technique for high-quality DWI on standard imagers without improved gradient hardware.
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