Items tagged “mri artifact”
8 results found
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...
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...
Published 17 Feb 2012
Lateral extra-articular hindfoot impingement with posterior tibial tendon split tear
Published 23 Jul 2012
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...
Shading artifact on MRI 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 loading of coil or cou...
Metallic orbital foreign body on MRI
Published 13 Aug 2016
Cross-excitation artifact (MRI)
Diagnosis almost certain
Published 15 Jun 2021