Abstract
Artifacts represent potential pitfalls in MR-angiography: radiologists should be aware of them to prevent their appearance. They can be classified according to the mechanism responsible for their genesis. Flow Artifacts are strictly related to modification of signal intensity induced by dephasing proton mechanism when the blood flow loses the characteristic laminar pattern; they are turbulence'artifact and artefact due to saturation. Hinge artefact, typical of 3DTOF sequence, is characterized by alternating hyper-hypointense punctiform images. Geometrical artefacts are caused by wrong geometric positioning of angiographic sequence or saturation bands; they are called hypointensity linear horizontal artefact and the artefact due to non-inclusion of the vase in the excited volume. Artifacts related to wrong acquisition time with respect to contrast medium bolus arrival are maki artefact and vascular blurring. Voluntary and involuntary movement are the primary cause of patient artifacts like the gost artifact. The main artifacts from post-processing consist of the artifact from projection of the background noise and the step artifact. Magnetic susceptibility artifacts are caused by paramagnetic external substances. Finally we remember radiofrequency artifacts, due to the instability of radiofrequency or nonhomogeneity of magnetic field or instability of the the system receiver-trasmitter.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Arena L, et al. (1995) MR imaging artifacts that simulate disease: how to recognize and eliminate them. Radiographics 15:1373–1394
Bradley WG, Jr, Stark DD (1992) Magnetic resonance imaging. Mosby-Year Book, St Louis
Carriero A, et al. (1994) Artifacts in magnetic resonance angiog-raphy. Radiol Med 88:765–770
Carriero A, et al. (1995) Diagnostic pitfalls in magnetic resonance angiography. Radiol Med 90:719–725
Colagrande S, Pazzaglini S (2007) Manuale di RM addominale. Poletto, Milano
Foo TK, et al. (2005) MR angiography physics: an update. Magn Reson Imaging Clin N Am 13:1–22
Glockner JF, et al. (2005) MR angiography interpretation: techniques and pitfalls. Magn Reson Imaging Clin N Am 13: 23–40
Maki JH, et al. (1996) Three-dimensional contrast-enhanced MR angiography. Top Magn Reson Imaging 8:322–344
Patton JA (1994) MR imaging instrumentation and image artifacts. Radiographics 14:1083–1096
Penman WH, et al. (1986) Artifacts from pulsatile flow in MR imaging. J Comput Assist Tomogr 10:473–483
Pusey E, et al. (1986) Magnetic resonance imaging artifacts: Mechanism and clinical significance. Radiographics 6:891–911
Zhang H, et al. (2007) 3D contrast-enhanced MR angiography. J Magn Reson Imaging 25:13–25
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2010 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Laghi, A., Paolantonio, P., Rengo, M., Lucchesi, P. (2010). Artifacts in MR-Angiography. In: Neri, E., Cosottini, M., Caramella, D. (eds) MR Angiography of the Body. Diagnostic Imaging. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-79717-3_4
Download citation
DOI: https://doi.org/10.1007/978-3-540-79717-3_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-79716-6
Online ISBN: 978-3-540-79717-3
eBook Packages: MedicineMedicine (R0)