Items tagged “mri artifact”
9 results found
Article
Aliasing on MRI
Aliasing on MRI, also known as wrap-around, is a frequently encountered MRI artifact that occurs when the field of view (FOV) is smaller than the body part being imaged. The part of the body that lies beyond the edge of the FOV is projected onto the other side of the image 5.
This can be correc...
Article
Gibbs and truncation artifacts
Gibbs artifact, also known as truncation artifact or ringing artifact, is a type of MRI artifact. It refers to a series of lines in the MR image parallel to abrupt and intense changes in the object at this location, such as the CSF-spinal cord and the skull-brain interface.
The MR image is reco...
Case
Herringbone artifact
Published
17 Feb 2012
53% complete
MRI
Case
Lateral extra-articular hindfoot impingement with posterior tibial tendon split tear
Published
23 Jul 2012
50% complete
MRI
Article
Central point artifact
The central point artifact is a focal dot of increased signal in the center of an image. It is caused by a constant offset of the DC voltage in the receiver. After Fourier transformation, this constant offset gives the bright dot in the center of the image as shown in the diagram.
The axial MRI...
Article
Shading artifact
Shading artifact is an MRI artifacts and refers to loss of signal intensity in one part of the image, leading to dark shading in this portion of the image.
Causes
uneven excitation of nuclei within the field; due to RF pulses applied at flip angles other than 90 and 180 degrees
abnormal loadi...
Case
Metallic orbital foreign body on MRI
Published
13 Aug 2016
92% complete
CT
MRI
Case
Cross-excitation artifact (MRI)
Published
15 Jun 2021
77% complete
MRI
Article
Inhomogeneity artifact
The inhomogeneity artifact is a type of magnetic resonance imaging artifact that occurs due to multiple factors, such as irregular anatomical area (for example, shoulder, hips, ankles), presence of metallic objects or inhomogeneity of the main field.
The inhomogeneity artifact appears as hyperi...
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