Items tagged “artefacts”
4 results found
Article
Mach bands
Mach bands or the Mach effect refers to an optical phenomenon from edge enhancement due to lateral inhibition of the retina 2. This is an inbuilt edge enhancement mechanism of the retina, where the edges of darker objects next to lighter objects will appear darker and vice versa, creating a fals...
Case
CT brain with severe motion artifact
Published
01 Nov 2013
46% complete
CT
Article
Speed displacement artifact
Speed displacement artifact, also known as propagation velocity artifact, is a gray scale ultrasound finding that can be identified as an area of focal discontinuity and displacement of an echo deeper than that its actual position in an imaged structure. Depth determination by an ultrasound mach...
Case
Aglet mimicking an intrapelvic foreign body
Published
13 Sep 2021
94% complete
X-ray