Two-point Dixon fat-water swapping artifact: lesion mimicker at musculoskeletal T2-weighted MRI.
Ankle
Artifact
Bone marrow
Chemical shift encoded
Disc
Dixon
Fat
Hip
MRI
Soft tissue
Spine
Water
Journal
Skeletal radiology
ISSN: 1432-2161
Titre abrégé: Skeletal Radiol
Pays: Germany
ID NLM: 7701953
Informations de publication
Date de publication:
Dec 2020
Dec 2020
Historique:
received:
09
03
2020
accepted:
09
06
2020
revised:
06
06
2020
pubmed:
20
6
2020
medline:
25
6
2021
entrez:
20
6
2020
Statut:
ppublish
Résumé
Fat-water swapping is an artifact specific to chemical shift encoded MRI and so-called Dixon methods. It is more frequent using the 2-point than the multi-point (> 2) Dixon method. Actually, fat-water swapping on the 2-point Dixon sequences partly triggered the development of the multi-point techniques. Fat-water swapping occurs on post-processing calculated fat- and water-only images, but not on the directly acquired in-phase and out-of-phase source images. It originates from a natural ambiguity between fat and water peaks that may cause inverted calculation between fat- and water-only voxels. Fat-water swapping artifact over large areas encompassing multiple tissues can easily be recognized, but it may be confusing when the calculation errors are limited to a single anatomic structure or a small area, especially on T2-weighted images. We report four cases with 2-point Dixon fat-water swapping artifacts mimicking musculoskeletal lesions at T2-weighted MRI and propose hints to avoid misinterpretation.
Identifiants
pubmed: 32556469
doi: 10.1007/s00256-020-03512-x
pii: 10.1007/s00256-020-03512-x
doi:
Substances chimiques
Water
059QF0KO0R
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2081-2086Références
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