Susceptibility‐weighted imaging and quantitative susceptibility mapping in the brain

Susceptibility‐weighted imaging (SWI) is a magnetic resonance imaging (MRI) technique that enhances image contrast by using the susceptibility differences between tissues. It is created by combining both magnitude and phase in the gradient echo data. SWI is sensitive to both paramagnetic and diamagnetic substances which generate different phase shift in MRI data. SWI images can be displayed as a minimum intensity projection that provides high resolution delineation of the cerebral venous architecture, a feature that is not available in other MRI techniques. As such, SWI has been widely applied to diagnose various venous abnormalities. SWI is especially sensitive to deoxygenated blood and intracranial mineral deposition and, for that reason, has been applied to image various pathologies including intracranial hemorrhage, traumatic brain injury, stroke, neoplasm, and multiple sclerosis. SWI, however, does not provide quantitative measures of magnetic susceptibility. This limitation is currently being addressed with the development of quantitative susceptibility mapping (QSM) and susceptibility tensor imaging (STI). While QSM treats susceptibility as isotropic, STI treats susceptibility as generally anisotropic characterized by a tensor quantity. This article reviews the basic principles of SWI, its clinical and research applications, the mechanisms governing brain susceptibility properties, and its practical implementation, with a focus on brain imaging. J. Magn. Reson. Imaging 2015;42:23–41 . © 2014 Wiley Periodicals, Inc ..

Medienart:

Artikel

Erscheinungsjahr:

2015

Erschienen:

2015

Enthalten in:

Zur Gesamtaufnahme - volume:42

Enthalten in:

Journal of magnetic resonance imaging - 42(2015), 1, Seite 23-41

Sprache:

Englisch

Beteiligte Personen:

Liu, Chunlei [VerfasserIn]
Li, Wei [Sonstige Person]
Tong, Karen A [Sonstige Person]
Yeom, Kristen W [Sonstige Person]
Kuzminski, Samuel [Sonstige Person]

Links:

Volltext
onlinelibrary.wiley.com
www.ncbi.nlm.nih.gov
search.proquest.com
www.pubmedcentral.nih.gov

Themen:

Hemorrhage
Iron
MRI
MRI, magnetic resonance imaging
MSA
MSA, magnetic susceptibility anisotropy
Magnetic resonance imaging
Magnetic susceptibility anisotropy
Multiple sclerosis
Myelin
QSM
QSM, quantitative susceptibility mapping
Quantitative susceptibility mapping
STI
STI, susceptibility tensor imaging
SWI
SWI, susceptibility weighted imaging
Stroke
Susceptibility tensor imaging
Susceptibility weighted imaging
TBI
TBI, traumatic brain injury
Traumatic brain injury

doi:

10.1002/jmri.24768

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

OLC1959467972