aliasing

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Related to Spatial aliasing: Temporal aliasing

aliasing

A phenomenon that occurs when digitising less than two samples per period in a periodic function, where the anatomy being imaged by magnetic resonance extends beyond the field of view (FOV). Areas extending beyond the FOV boundaries are aliased back into the image to appear at artefactual locations.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

ali·as·ing

(āl'ē-ăs-ing)
Magnetic resonance imaging artifact produced when anatomy outside the field of view is mismapped inside it.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
They float and are advected by the flow, but the spatial aliasing problem as discussed in Section 4.1 makes the results unconvincing.
One of the most important remaining problems is to find a solution for the spatial aliasing problems inherent in the presented flow blocking method.
Although in theory only higher-than-dominant frequencies are at risk of spatial aliasing, in practice setting bin size according to the highest frequency invokes data redundancy.
Spatial aliasing in the directivity pattern is also evident above the spatialaliasing cutoff frequency, which is 4 kHz for the specific array geometry.