| truncation | 1. The act of truncating, lopping, or cutting off. 2. The state of being truncated. 3. <chemical> The replacement of an edge or solid angle by a plane, especially when the plane is equally inclined to the adjoining faces. Origin: L. Truncatio. Source: Websters Dictionary (01 Mar 1998) |
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| artifact | Something artificial, a distortion that does not reflect normal anatomy or pathology, not usually found in the body. For example: in radiology, the appearance on an X-ray of a surgical metal clip that obscures the clear view of an anatomical structure. (16 Dec 1997) |
| chemical shift artifact | In magnetic resonance imaging, a dark band caused by a biochemical difference in resonant frequency of adjacent regions rather than a true anatomic separation. (05 Mar 2000) |