Diffusion-weighted imaging | Radiology Reference Article - Radiopaedia.org
WEBMar 20, 2023 · Diffusion-weighted imaging (DWI) is a form of MR imaging based upon measuring the random Brownian motion of water molecules within a voxel of tissue. In general simplified terms, highly cellular tissues or those with cellular swelling exhibit lower diffusion coefficients.
Pitfalls and Artifacts of Diffusion-Weighted Imaging
WEBMay 31, 2021 · Numerous artifacts can be generated during the acquisition of DWI. There are five main artifacts of single-shot DW echo-planar imaging: (1) Eddy current artifacts due to echo-planar imaging phase-encoding and readout gradients, and motion-probing gradient pulses for diffusion weighting. (2) Susceptibility artifacts. (3) …
Artifacts and pitfalls in diffusion MRI - Wiley Online Library
WEBAug 8, 2006 · In this article, artifacts that one may encounter using diffusion MRI are reviewed in relation to their cause. The artifacts are explained and described on a qualitative basis, and possible strategies that have been developed to mitigate or overcome them are introduced.
Diffusion weighted imaging: Technique and applications
WEBSep 9, 2016 · DWI is susceptible to various artifacts, e.g., T2 shine through, T2 black out, ghosting, blurring and distortions. Tissues with very long relaxation times might tend to retain signal on high b value images.
Whole-Body Diffusion-Weighted MRI: Tips, Tricks, and Pitfalls
WEBNov 23, 2012 · We discuss the tips, tricks, and pitfalls of implementing whole-body DWI in current clinical MRI systems. Included are the choice of field strength, patient positioning on the unit, optimization of the imaging sequence, …
How to Identify and Avoid Artifacts on DWI | SpringerLink
WEBJan 1, 2011 · In this chapter, a very detailed overview of the acquisition parameters of the DWI sequence is presented. Image quality issues like signal to noise ratio and image artifacts are exposed from different points of view, …
Diffusion-weighted imaging in acute ischemic stroke
WEBFeb 13, 2024 · Diffusion-weighted imaging (DWI) is a commonly performed MRI sequence for the evaluation of acute ischemic stroke and is very sensitive in the detection of small and early infarcts.
Diffusion-weighted MRI of whole body: artifacts and pitfalls
WEBMajor artifacts producing bright signal at DWI are flow artifacts (in the venulas, near the lung hilar vessels), Nyquist artifact, failed fat suppression (e.g. due to metal objects), susceptibility artifacts (at skin/coil contact).
Comparison of TGSE-BLADE DWI, RESOLVE DWI, and SS-EPI DWI …
WEBOct 21, 2022 · We compared distortion and artifacts among three diffusion acquisition techniques (single-shot echo-planar imaging [SS-EPI DWI], readout-segmented EPI [RESOLVE DWI], and 2D turbo gradient- and ...
Diffusion-Weighted MRI in the Body: Applications and …
WEBA short discussion ensues on the technical aspects of performing DWI in the body. The emerging applications of DWI for tumor detection, tumor characterization, distinguishing tumor tissue from nontumor tissue, and monitoring and …
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