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aliasing |
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aliasing /ali·as·ing/ (a´le-as-ing) 1. introduction of an artifact or error in sampling of a periodic signal when the sampling frequency is too low to capture the signal properly. 2. in pulsed Doppler ultrasonography, an artifact occurring when the velocity of the sampled object is too great for the Doppler frequency to be determined by the system. 3. an artifact occurring in magnetic resonance imaging when a part being examined is larger than the field of view; an image of the area outside the field of view appears as an artifact inside the field of view. aliasing, an artifact that is caused by undersampling of signal data in diagnostic imaging. aliasing an imaging artefact in Doppler ultrasound, governed by the Nyquist limit, in which the blood flow direction appears to be reversed. An experienced operator can readily distinguish the aliased image from the true image. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Idealstor's Server Aliasing Module (SAM)
and Backup Versioning Module (BVM), two optional components for Ibac,
Idealstor's data protection software, have been upgraded to match
the evolving needs of customers and further enhance the company's
product line. The GeForce 7800 GTX also includes new image
quality features such as transparency supersampling and multisample
antialiasing, which enhances visual quality by removing jagged edges
from 3D images, minimizing aliasing, and high dynamic range (HDR)
lighting support for delivering next-generation lighting and shadowing
effects.
These URL aliasing features reduce IP address space usage and lower
certificate costs. |
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