Title :
Quantization noise and transverse coherence artifacts in 3-D MR images
Author :
Wood, Michael L.
Author_Institution :
New England Med. Center, Boston, MA, USA
Abstract :
The author reports on an analysis of artifacts or noise caused by either the inaccurate quantization of data or the propagation of coherent transverse magnetization through different phase-encoding steps in three-dimensional (3-D) magnetic resonance imaging (MRI), using images from a human patient an an experimental phantom. Quantization noise became comparable to random noise when the 3-D magnetic resonance data was represented by fewer than 16 bits. Alternative strategies for either maintaining or destroying transverse coherences by using rephasing gradients and spoiler gradients are compared
Keywords :
biomedical NMR; noise; patient diagnosis; 3D NMR images; experimental phantom; human patient; phase-encoding steps; quantisation noise; spoiler gradients; transverse coherence artifacts; Humans; Image analysis; Imaging phantoms; Magnetic analysis; Magnetic noise; Magnetic resonance; Magnetic resonance imaging; Magnetization; Phase noise; Quantization;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95839
